Abstract
THE colourless alga Prototheca zopfii does not require vitamin B12 as a growth factor, whereas at least half the marine algal flagellates and diatoms which have been investigated in pure culture1, the protozoan flagellate Ochromonas malhamensis2, and Euglena gracilis3, have all been shown to have a growth requirement for this compound.
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LLOYD, D. Level of Vitamin B12 in Propionate-grown Prototheca zopfii. Nature 211, 765 (1966). https://doi.org/10.1038/211765a0
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DOI: https://doi.org/10.1038/211765a0
