00333nam a2200121Ia 4500008004100000022001400041040001100055100002800066245001200094260007800106300001600184300001100200251112s9999||||xx |||||||||||||| ||und||  a0036-8075  aCNCLSA  aDaniel E. Koshland, Jr. 0aScience  c1992bThe American Association for the Advancement of ScienceaWashington  aP. 893-1800  bV. 254