Like methionine, a diazir
Like methionine, a diazirine derivative of this amino acid is a photo-activateable crosslinker. A small type of proteoglycan rich in this amino acid includes decorin and lumican. Ribonuclease inhibitor contains a domain rich in repeats of it, which is also found in toll-like receptors. Like amino acids labelled I and V, this amino acid cannot be processed in sufferers of maple syrup urine disease. This amino acid is also the namesake of a domain found in c-Fos, c-Jun, and other transcription factors that allows them to form dimers; that domain is its namesake zipper. For 10 points, name this amino acid which contains an isobutyl side chain and whose one-letter abbreviation is L.
Like methionine, a diazirine derivative of this amino acid is a photo-activateable crosslinker.
leucine [or L until it is read]