Studies in the Physical Chemistry of Amino Acids, Peptides and

Dec., 1937

SOLUBILITY OF

[CONTRIBUTION FROM

THE

CYSTINE I N

SOLUTIONS OF

CHLORIDES AiKD

SULFATES

2717

DEPARTMENT O F PHYSICAL CHEMISTRY, HARVARD MEDICAL SCHOOL]

Studies in the Physical Chemistry of Amino Acids, Peptides and Related Substances. X. The Solubility of Cystine in Solutions of Chlorides and Sulfates BY THOMAS L. MCMEEKIN,EDWINJ. COHNAND MURIELH. BLANCHARD Cystine was the first of the amino acids to be value 0.109 taken by Blix,l with the recent value of 0.108 discovered. Though not known to be a con- g. per liter of Loring and Dii V'igneaud,2 and of 0.1095 nf Dalton ant1 S ~ h m i d t .'Thr ~ purified 1 cystine in a 1 $