Dietary Intake and Plasma Levels of Choline and Betaine in Children with Autism Spectrum Disorders
Figure 1
Interrelated and interdependent pathways of (1) folate- and betaine-dependent methionine resynthesis from homocysteine utilizing folate-dependent methionine synthase (MS) and betaine-dependent betaine : homocysteine methyltransferase (BHMT); (2) choline-dependent betaine synthesis; (3) phosphtidylethanoloamine methyltransferasse (PEMT) conversion of phosphatidylethanolamine (PE) to phosphatidylcholine (PC); and (4) choline-dependent synthesis of PC and acetylcholine.