Media type: E-Article Title: Spectrophotometric determination of tryptophan in intact proteins by the acid ninhydrin method Contributor: Molnár-Perl, Ibolya; Pintér-Szakács, Margit Published: Elsevier BV, 1989 Published in: Analytical Biochemistry, 177 (1989) 1, Seite 16-19 Language: English DOI: 10.1016/0003-2697(89)90005-5 ISSN: 0003-2697 Origination: Footnote: