The algae P. antarctica has two forms of the enzyme that makes the amino acid methionine, one needing B12, and one that is slower, but doesn't need it. This means it has the ability to adapt and ...

Contributions of current research to algal systematics / G.W. Prescott -- Criteria and procedures in present-day algal taxonomy / C. van den Hoek -- The gross classification of algae / Tyge ...

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An iceberg floats in Antarctica's cold waters. Credit: Makoto Saito, Woods Hole Oceanographic Institution Vitamin B12 deficiency in people can cause a slew of health problems and even become fatal.