Vitamin B12

The biosynthesis of B 12 , involving up to 30 different enzyme-mediated steps, only occurs in bacteria. Thus, most eukaryotes require an external source of B 12 , and yet the vitamin appears to have only two functions in eukaryotes: as a cofactor for the enzymes methionine synthase and methylmalonyl...

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Chi tiết về thư mục
Những tác giả chính: Smith, A, Warren, M, Refsum, H
Định dạng: Journal article
Được phát hành: Elsevier 2018