Hydrolysis of proteins＆BULL，HENRY B 1
The fractionation of proteins by electrophoresis-convection＆CANN，JOHN R．，and KIRKWOOD，JOHN G 9
Studies on polypeptides and amino acids by countercurrent distribution＆CRAIG，LYMAN C．，GREGORY，J．DELAFIELD，and BARRY，GUY T 24
Studies on the cytochemistry of proteins＆DANIELLI，J．F 32
Competitive reactions and antagonisms in the biosynthesis of amino acids by Neurospora＆EMERSON，STERLING 40
The quantitative analysis of amino acids in proteins：insulin and lysozyme＆FROMAGEOT，CLAUDE 49
The metabolism of peptides＆FRUTON，JOSEPH S．，AND SIMMONDS，SOFIA 55
Ⅹ-ray analysis and protein structure＆HODGKIN，DOROTHY CROWFOOT 65
Protein mercaptides＆HUGHES，WALTER L．JR 79
Localization of cellular proteins by enzymatic hydrolysis＆KAUFMANN，BERWIND P．，GAY，HELEN，and MCDONALD，MARGARET R 85
The application of the isotopic derivative method to the analysis of proteins＆KESTON，ALBERT S．，and UDENFRIEND，SIDNEY 92
The nature of some ion-protein complexes＆KLOTZ，IRVING M 97
The application of the isotopic derivative technic to the study of protein structure＆LEVY，MILTON，and SLOBODIANSKY，EVELYN 113
Structure and enzymatic break-down of proteins＆LINDERSTROM-LANG，K 117
The liver proteins＆LUCK，J．MURRAY 127
Size relationship among similar proteins．Association and dissociation reactions of protein units＆PEDERSEN，KAI O 140
Some chemical investigations on the structure of insulin＆SANGER，F 153
Some aspects of the biosynthesis of amino acids＆SHEMIN，DAVID 161
Some consideration of the interaction of the metal peptidases with their substrates＆SMITH，EMIL L．，and LUMRY，RUFUS 168
Chromatographic determination of the amino acid composition of proteins＆STEIN，WILLIAM H．，and MOORE，STANFORD 179
Physical and chemical studies of gramicidin and some implications for the study of proteins＆SYNGE，R．L．M 191
Peptide bond synthesis in normal and malignant tissue＆ZAMECNIK，PAUL C．，and FRANTZ，IVAN D．，JR 199