00422nam a2200157 a 450000500170000002000150001708200150003210000220004710000180006924500360008725000110012326000370013430000260017149000450019763000220024220251203091715.0  a0867201371  a572.8bFRE  aFreifelder, David  aMalacinski M.  aEssentials of molecular biology  a2nd ed  aBostonbJones and Bartlettc1993  axvii,478p,c24cm.bHB  aThe Jones and Bartlett series in biology  aMolecular biology