00341nam a2200121Ia 4500008004100000022001400041040001100055100002700066245001200093260008600105300001700191300001100208251112s9999||||xx |||||||||||||| ||und||  a0036-8075  aCNCLSA  aDaniel E. Koshland Jr. 0aScience  cMay 20, 1994bThe American Association for the Advancement of ScienceaWashington  aP. 1053-1990  bV. 264