ABSTRACT
A small proportion of the flavin coenzymes are linked covalently with tissue proteins,[11] including some vital enzymes, such as sarcosine dehydrogenase, succinic dehydrogenase, and monoamine oxidase. Unlike humans, who cannot synthesize ascorbic acid from its precursors, some species of mammals have large amounts of the microsomal ascorbic-acidsynthesizing enzyme, L-gulonolactone oxidase, which contains covalently bound flavins.
