From Simon Kelterborn, Peter Hegemann lab, Humboldt University-Berlin October 2017

Cloning vector for Streptococcus pyogenes Cas9 (SpCas9) single guide RNA transcription, controlled by the U6 snRNA promoter #4 (3’ of Cre15.g640800). The 20 bp target site can be inserted in a cut-ligation reaction as annealed oligos into an Esp3I cloning site following the protocol of Ann Ran (Ran et al. 2013). The immediate 4-bp sequence upstream of the transcriptional start site was changed to ACTT in all U6 constructs to simplify the cloning procedures.

Host strain: XL1-Blue
Selection in E. coli: ampicillin
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

Ran FA, Hsu PD, Wright J, Agarwala V, Scott DA, Zhang F (2013) Genome engineering using the CRISPR-Cas9 system. Nat Protoc. 8:2281-2308

From Simon Kelterborn, Peter Hegemann lab, Humboldt University-Berlin October 2017

Vector for single guide RNA targeting the phytoene synthase gene PSY1 with RNA scaffold for Streptococcus pyogenes Cas9 (SpCas9), controlled by the U6 snRNA promoter #4. Vector contains an aphVIII cassette for selection on paromomycin.

Target: PSY1 (Cre02.g095092)
Protospacer: GCGCTGGATCTGGCCACGACCG
PAM: NGG

Selection in C. reinhardtii: paromomycin
Host strain: XL1-Blue
Selection in E. coli: ampicillin
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

From Simon Kelterborn, Peter Hegemann lab, Humboldt University-Berlin October 2017

Cloning vector for Staphylococcus aureus Cas9 (SaCas9) guide RNA transcription, controlled by the U6 snRNA promoter #1 (5’ of Cre08.g377251). The 20 bp target site can be inserted in a cut-ligation reaction as annealed oligos into an Esp3I cloning site following the protocol of Ann Ran (Ran et al. 2013). The immediate 4-bp sequence upstream of the transcriptional start site was changed to ACTT in all U6 constructs to simplify the cloning procedures.

HindIII and KpnI restriction sites can be used for C. reinhardtii antibiotic resistance gene insertion (aphVII, aphVIII, ble).

Host strain: DH10b
Selection in E. coli: ampicillin
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

Ran FA, Hsu PD, Wright J, Agarwala V, Scott DA, Zhang F (2013) Genome engineering using the CRISPR-Cas9 system. Nat Protoc. 8:2281-2308

From Andre Greiner, Peter Hegemann lab, Humboldt University-Berlin October 2017

Cloning vector for Staphylococcus aureus Cas9 (SaCas9) guide RNA transcription, controlled by the U6 snRNA promoter #2. The 20 bp target site can be inserted in a cut-ligation reaction as annealed oligos into an Esp3I cloning site following the protocol of Ann Ran (Ran et al. 2013). The immediate 4-bp sequence upstream of the transcriptional start site was changed to ACTT in all U6 constructs to simplify the cloning procedures.

HindIII and KpnI restriction sites can be used for C. reinhardtii antibiotic resistance gene insertion (aphVII, aphVIII, ble).

Host strain: XL1-Blue
Selection in E. coli: ampicillin
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

Ran FA, Hsu PD, Wright J, Agarwala V, Scott DA, Zhang F (2013) Genome engineering using the CRISPR-Cas9 system. Nat Protoc. 8:2281-2308

From Andre Greiner, Peter Hegemann lab, Humboldt University-Berlin October 2017

Cloning vector for Staphylococcus aureus Cas9 (SaCas9) guide RNA transcription, controlled by the U6 snRNA promoter #3 (3’ of Cre08.g371751). The 20 bp target site can be inserted in a cut-ligation reaction as annealed oligos into an Esp3I cloning site following the protocol of Ann Ran (Ran et al. 2013). The immediate 4-bp sequence upstream of the transcriptional start site was changed to ACTT in all U6 constructs to simplify the cloning procedures.

HindIII and KpnI restriction sites can be used for C. reinhardtii antibiotic resistance gene insertion (aphVII, aphVIII, ble).

Host strain: XL1-Blue
Selection in E. coli: ampicillin
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

Ran FA, Hsu PD, Wright J, Agarwala V, Scott DA, Zhang F (2013) Genome engineering using the CRISPR-Cas9 system. Nat Protoc. 8:2281-2308

From Andre Greiner, Peter Hegemann lab, Humboldt University-Berlin October 2017

Cloning vector for Staphylococcus aureus Cas9 (SaCas9) guide RNA transcription, controlled by the U6 snRNA promoter #4 (3’ of Cre15.g640800). The 20 bp target site can be inserted in a cut-ligation reaction as annealed oligos into an Esp3I cloning site following the protocol of Ann Ran (Ran et al. 2013). The immediate 4-bp sequence upstream of the transcriptional start site was changed to ACTT in all U6 constructs to simplify the cloning procedures.

HindIII and KpnI restriction sites can be used for C. reinhardtii antibiotic resistance gene insertion (aphVII, aphVIII, ble).

Host strain: XL1-Blue
Selection in E. coli: ampicillin
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

Ran FA, Hsu PD, Wright J, Agarwala V, Scott DA, Zhang F (2013) Genome engineering using the CRISPR-Cas9 system. Nat Protoc. 8:2281-2308

From Andre Greiner, Peter Hegemann lab, Humboldt University-Berlin October 2017

Cloning vector for Staphylococcus aureus Cas9 (SaCas9) guide RNA transcription, controlled by the U6 snRNA promoter #4 (3’ of Cre15.g640800). The 20 bp target site can be inserted in a cut-ligation reaction as annealed oligos into an Esp3I cloning site following the protocol of Ann Ran (Ran et al. 2013). The immediate 4-bp sequence upstream of the transcriptional start site was changed to ACTT in all U6 constructs to simplify the cloning procedures.

Vector contains an aphVIII cassette for selection on paromomycin.

Selection in C. reinhardtii: paromomycin
Host strain: XL1-Blue
Selection in E. coli: ampicillin
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

Ran FA, Hsu PD, Wright J, Agarwala V, Scott DA, Zhang F (2013) Genome engineering using the CRISPR-Cas9 system. Nat Protoc. 8:2281-2308

From Andre Greiner, Peter Hegemann lab, Humboldt University-Berlin October 2017

Vector for guide RNA targeting the phytoene synthase gene PSY1 with scaffold for Staphylococcus aureus Cas9 (SaCas9), controlled by the U6 snRNA promoter #4. Vector contains an aphVIII cassette for selection on paromomycin.

Target: PSY1 (Cre02.g095092)
Protospacer: GCGCTGGATCTGGCCACGACCG
PAM: NGGRR

Selection in C. reinhardtii: paromomycin
Host strain: XL1-Blue
Selection in E. coli: ampicillin
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

From Irina Sizova, Peter Hegemann lab, Humboldt University-Berlin October 2017

Streptomyces rimosus aminoglycoside phosphotransferase aphVII selection marker optimized to C. reinhardtii codon bias, controlled by the HSP70A/RBCS2 tandem promoter and RBCS2 3’ UTR.

Selection in C. reinhardtii: hygromycin B (10-40 μg/ml)
Host strain: XL1-Blue
Selection in E. coli: ampicillin (100 µg/ml)
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

From Irina Sizova, Peter Hegemann lab, Humboldt University-Berlin October 2017

Streptomyces rimosus aminoglycoside-5 ́- phosphotransferase aphVIII selection marker optimized to C. reinhardtii codon bias, controlled by the HSP70A/RBCS2 tandem promoter and RBCS2 3’ UTR.

Selection in C. reinhardtii: paromomycin (10-40 μg/ml)
Host strain: DH10b
Selection in E. coli: ampicillin (100 µg/ml)
Link to sequence and map
Sequence (.docx file)

Overview of all CRISPR/Cas9 plasmids from the Hegemann lab

Visit www.chlamy.de for more info or contact CRISPR@chlamy.de


Greiner, A., Kelterborn, S., Evers, H., Kreimer, G., Sizova, I., and Hegemann, P. Targeting of photoreceptor genes via zinc-finger nucleases and CRISPR/Cas9 in Chlamydomonas reinhardtii. Plant Cell 30 (2017). https://doi.org/10.1105/tpc.17.00659

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: paromomycin
Reporter: YFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: paromomycin
Reporter: CFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: paromomycin
Reporter: Gaussia princeps Luciferase

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: paromomycin
Reporter: GFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: paromomycin
Reporter: RFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: paromomycin
Reporter: Gaussia princeps Luciferase

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: hygromycin B
Reporter: YFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: hygromycin B
Reporter: CFP

Sequence (.gb)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: hygromycin B
Reporter: Gaussia princeps Luciferase

Sequence (.gb)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: hygromycin B
Reporter: GFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: hygromycin B
Reporter: RFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: hygromycin B
Reporter: Gaussia princeps Luciferase

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: Zeocin
Reporter: YFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: Zeocin
Reporter: CFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: Zeocin
Reporter: Gaussia princeps Luciferase

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: Zeocin
Reporter: GFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: Zeocin
Reporter: RFP

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: Zeocin
Reporter: Gaussia princeps Luciferase

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Kyle Lauersen, Olaf Kruse lab, Bielefeld University-Germany, November 2017

Host strain: DH5α
Selection in E. coli: ampicillin
Selection in C. reinhardtii: spectinomycin
Reporter: Gaussia princeps Luciferase

Sequence (.gb file)


Wichmann J, Baier T, Wentnagel E, Lauersen KJ, Kruse O. Tailored carbon partitioning for phototrophic production of (E)-α-bisabolene from the green microalga Chlamydomonas reinhardtii. Metab Eng. 2017 Dec 16. pii: S1096-7176(17)30395-6. doi: 10.1016/j.ymben.2017.12.010. [Epub ahead of print]

From Elizabeth Specht, Stephen Mayfield Lab, University of California-San Diego, May 2018

Vector: pBluescript

Origin: Created by seamless cloning of several different fragments; fully sequence-verified.

Insert: This construct contains two intact cassettes and one truncated cassette. The first intact cassette is the ARS2 coding sequence, driven by the chimeric HSP70-RBCS2 promoter and followed by its endogenous 3’ UTR; the CDS and 3’ UTR were amplified from cDNA harvested from a strain under sulfur starvation conditions. The second intact cassette is the ARG7 CDS, surrounded by its endogenous promoter/5’ UTR and 3’ UTR, which were amplified from genomic DNA of wild type CC1010 strain. The final, truncated cassette contains the 3’ half of the CDS of hygromycin resistance gene followed by the RBCS2 3’ UTR; upstream of this lies a 1.6kb intron that was amplified from CC1010 genomic DNA.

Total insert size is 9,093 bp.

Comment: This plasmid represents one half of the pair of plasmids designed to detect homologous recombination in C. reinhardtii. Upon recombination with its partner, pHR23, it will produce an intact, functional hygromycin resistance cassette. pHR18 is the plasmid that has been transformed into CC-1820 to create the strain B12.

Host strain: DH5α

Selection: Ampicillin resistant in E. coli; restores arginine prototrophy in arg7 Chlamydomonas mutants.

Sequence