<prompt> Melatonin is derived from -TyrosineTryptophanGlutathioneNone  <response>: Ans. is -b i.e., Tryptophan Amino acidsBiological important compoundTyrosineCatecholamines epinephrine Q, norepinephrine Q, dopamine Q, thyroxine Q. triiodothrvonine, melanin Q.Note : - Phenylalanine is the precursor of tyrosine, thus it can also give rise to all these compounds through tyrosine phenylalanine - Tyrosine Q - Catecholamines Q, thyroxine Q, T3 melanin Q.TryptophanVitamin niacin Q, melatonin Q, Serotonin QGlycine Q,Arginine Q,methionine QCreatine QGlycine, cysteineBile saltsGlycineHemeAspartic acid and glutaminePyrimidine basesGlycine Q, aspartic acid, glutaminePurine bases Qb-alanineCoertzyme-AArginineNitric oxide QLysine, MethionineCarnitine 