Introduction of methyl groups from epsilon-N-methyllysine into the one-carbon pool.

Radioactivity from ingested ?-N-³H] methyl-and ?-N-³H]-dimethyllysine residues of reductively methylated casein are rapidly and efficiently absorbed and incorporated into tissues of the chicken. Introduction of label into choline, carnitine and methionine suggests that these amino acids contribute methyl groups to the one-carbon pool.