Techniques in Protein Chemistry IV compiles papers presented at the Sixth Protein Society Symposium held in San Diego, California in 1992. This book discusses the mass spectrometry in protein sequence and structural investigations; site specific heterogeneity of N-linked oligosaccharides on recombinant human erythropoietin; and modification of thiophosphorylated proteins with extrinsic probes. The cysteine and tryptophan amino acid analysis of ABRF92-AAA; development of separation strategies for proteins by capillary electrophoresis; and peptide mapping of 2-D gel proteins by capillary HPLC are also elaborated. This text likewise covers the single syringe-pump solid-phase protein sequencer; hydrophobic contact density distribution functions; and application of chemical shift calculation to protein structure determination by NMR. This publication is valuable to biologists and students concerned with the developments in mass spectrometry of proteins.