. "Edited: Jassal, B, 2011-09-29"^^ . "Reviewed: D'Eustachio, P, 2011-10-13"^^ . "Authored: Stephan, R, 2010-10-24"^^ . "Remethylation of homocysteine to methionine can also happen using betaine as a methyl donor. This reaction is also part of choline catabolism (Li et al. 2008)."^^ . . . . . . "Remethylation of homocysteine via betaine degradation"^^ . "2.1.1.5"^^ . . . . .