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(Gln, Q)

An amino acid (146 Da) commonly found in proteins, the amide at the γ–carboxyl of glutamate. Crosslinks between glutamine and lysine side groups, formed by transglutaminase, are important in stabilizing the structure of protein aggregates such as fibrin. Tissue culture media for animal cells are commonly enriched tenfold for glutamine, the excess presumably acting as a general carbon source.

Subjects: Sports and Exercise Medicine — Chemistry.

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