antisera were raised against tryptophan , 5-hydroxytryptophan , 5-hydroxytryptamine , 5-methoxytryptophan , and 5-methoxytryptamine , by conjugating each molecule to bovine serum albumin and to human serum albumin via glutaraldehyde , in such a way as to preserve the original part .
C0041249
tryptophan
C0000578
5-hydroxytryptophan