PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7662110-1 1995 Use of insulin"s intrinsic tyrosine absorption and fluorescence to monitor its interaction with the insulin receptor is limited because the spectral properties of the receptor tryptophan residues mask the spectral properties of the hormone tyrosine residues. Tryptophan 176-186 insulin Homo sapiens 7-14 7662110-2 1995 We describe the synthesis of an insulin analog where A14 tyrosine is replaced by a tryptophan analog, 5-hydroxytryptophan. Tryptophan 83-93 insulin Homo sapiens 32-39 7662110-3 1995 This insulin is spectrally enhanced since 5-hydroxytryptophan has an absorption band above 300 nm which is at lower energies than the absorption of tryptophan. Tryptophan 51-61 insulin Homo sapiens 5-12