Human Biochemistry, Volume 1 - Murray R. 1993

Metabolism of Proteins and Amino Acids
Conversion of Amino Acids into Specialized Products
Methionine

Methionine as a methyl group donor was already discussed in Chapter 31. In the form of S-adenosylmethionine, it serves as the principal source of methyl groups in the body. Methyl groups can be utilized either directly or in an oxidized form. The methyl carbon can be incorporated into a single-carbon fragment, which conjugates with Glycine during Serine synthesis. In the form of S-adenosylmethionine, methionine acts as a precursor for the 1,3-diaminopropane moiety of Polyamines, spermine, and spermidine (see the “Ornithine” section below and Fig. 32.6).



Last update: 06/08/2026

Editorial and Educational Adaptation: This material has been compiled based on the primary/original source text. The project team performed an editorial review, corrected technical inaccuracies, structured sections, and adapted the content for an educational format.

What was processed:

  • elimination of formatting defects (OCR errors, structural breaks, corrupted characters);
  • editorial organization of content;
  • standardization of terminology in accordance with academic sources;
  • verification of factual statements against the original source text.

All mentions of the author, publication year, and origin of the primary text have been preserved in accordance with the source.