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James Gregory

Plasmodia and Chlamydomonas also have a common ancestor. The plastid is similar to the Plasmodia apicoplast, but one major difference is obviously photosynthesis. There's also some gene overlap, in particular a gene called hap2 or GCS1, that is involved in gamete fusion.

Your point is a good one though. By no means is Chlamydomonas the only option for recombinant proteins from a photosynthetic organism. There's a vast amount of genetic diversity among algae, thus there is probably one that makes Pfs25 more efficiently. I must confess that I am not familiar with dinoflagellate genetics, but important characteristics of any organism would be photosynthetic growth, easily transformable and scaleable, as well as well defined promoters.

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