Determination of Protein Concentrations Using AAA-Direct

Application Note 142 Determination of Tryptophan Using AAA-Direct ™ INTRODUCTION Tryptophan (Trp) is a difficult amino acid to determine in proteins and peptides because it chemically decomposes during acid hydrolysis. Consequently, many procedures have been developed for the independent preservation…

Technical Note 50 Determination of the Amino Acid Content of Peptides by AAA-Direct INTRODUCTION EQUIPMENT ™ The AAA-Direct system separates amino acids on a high performance anion-exchange column and directly detects them by integrated amperometry.1, 2 AAA-Direct has advantages over…

Application Note 130 Identification of a Hydroxylysine-Containing Peptide Using AAA-Direct™ INTRODUCTION One type of protein microheterogeneity is a result of the posttranslational modification of lysine (Lys) to hydroxylysine (Hyl). This modification normally occurs in collagen and a few other proteins…

[ APPLICATION NOTEBOOK ] Amino Acid Analysis Application Notebook [ CONTENTS ] [ INTRODUCTION ] Waters UPLC Amino Acid Analysis Solution................................................................................9 UPLC Amino Acid Analysis Solution............................................................................................... 11 Enhancement of the UPLC Amino Acid Analysis Solution with Flexible Detector Options......................................................................................................... 15…