this result is consistent with previous evidence which indicates that the modified tryptophan is the glu-35 ester of delta1-hydroxytryptophan-108 ( imoto , t. , and rupley , j.a . ( 1973 ) j. mol . biol . 80 , 657-667 ; beddell , c. r. , blake , c. c. f. , and oatley , s. j . ( 1975 ) j. mol . biol . 97 , 643-654 ) .
C0041249
tryptophan
C0000578
hydroxytryptophan