00305nam a2200109Ia 4500008004100000040001100041100002500052245003200077260006200109300001400171300001000185251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aRaymond B. Griffiths 4aThe Journal of Cell Biology  cOctober, 1974bThe Rockefeller University PressaNew York  aP. 1-1118  bV. 63