00333nam a2200121Ia 4500008004100000022001400041040001100055100002500066245003200091260006300123300001500186300001000201251112s9999||||xx |||||||||||||| ||und||  a0021-9525  aCNCLSA  aRaymond B. Griffiths 4aThe Journal of Cell Biology  cNovember, 1975bThe Rockefeller University PressaNew York  aP. 1A-483A  bV. 67