00348    a2200121   4500020001500000082001900015100002700034245004300061260005300104300002000157650002400177650002500201  a0521586917  a575.10724bNIC  aNicholl, Desmond S. T.  aAn introduction to genetic engineering  aNew YorkbCambridge University Pressc1994g1994  axiv,168p.c22cm  aGenetic engineering  aInstitute of biology