00378nam a2200121Ia 4500008004100000022001400041040001100055100002700066245008400093260005400177300001600231300000900247251112s9999||||xx |||||||||||||| ||und||  a0027-8424  aCNCLSA  aNicholas R. Cozzarelli 0aProceedings Of The National Academy Of Sciences Of The United States Of America  c1999bThe National Academy Of ScienceaWashington  aP.8801-9966  bV.96