00326nam a2200109Ia 4500008004100000040001100041100002100052245004000073260007600113300001600189300001100205251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aWilliam H. Stein 4aThe Journal of Biological Chemistry  cMarch 10, 1970bThe American Society of Biological Chemists, IncaU.S.A  aP. 907-2188  bV. 245