00326    a2200121   4500020001500000082001600015100003100031245004100062250001200103260004800115300002200163650001900185  a019963792x  a660.65bGEN  aJoyner, Alexandra L. eed.  aGene targetingba practical approach  a2nd ed.  aOxfordbOxford University Pressc2000g2000  axviii,293p.c24cm  aGene Targeting