With progress in biotechnology, the cost of manufacturing of every amino acid has been significantly reduced, which has been one of the key factors within the expansion of use of amino acids in animal feed. The hardened dental calculus on prehistoric teeth suggests that folks ate purple nutsedge, a weedy plant rich in carbohydrates.

Cho YW, Hong T, Hong S, Guo H, Yu H, Kim D, Guszczynski T, Dressler GR, Copeland TD, Kalkum M, Ge Okay: PTIP associates with MLL3- and MLL4-containing histone H3 lysine 4 methyltransferase complex.

DL-Methionine is produced by chemical synthesis from raw materials resembling acrolein, hydrocyanic acid and methyl mercaptan.

yahoo.comThe exception to the rule is the DOT1 family, members of which methylate K79 in the globular region of histone H3 and which are structurally not associated to SET-domain proteins 4 - 6 Recent work suggests that SET-domain-containing proteins methylate just a few proteins along with histones (see later)