00271nam a2200109Ia 4500008004100000100002000041245002700061260002900088490000900117600001800126650001700144140224s9999    xx            000 0 und d  aPacker, Lester   aMethods in Enzymology.  aNew YorkbAcademic Press  av105  aLester Packer  aBiochemistry