00343nam a2200121Ia 4500008004100000022001400041040001100055100002700066245001200093260008900105300001600194300001100210251112s9999||||xx |||||||||||||| ||und||  a0036-8075  aCNCLSA  aDaniel E. Koshland Jr. 0aScience  cAugust 14, 1992bThe American Association for the Advancement of ScienceaWashington  aP. 849-2012  bV. 257