PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19103311-0 2009 Incorporation of 5-hydroxytryptophan into transferrin and its receptor allows assignment of the pH induced changes in intrinsic fluorescence when iron is released. 5-Hydroxytryptophan 17-36 transferrin Homo sapiens 42-53