00446nam0a2200121i004500001000500000005001700005035001500022041000800037100002100045245016600066260004100232300005100273677620260715160641.0  atr986059380 ager1 aWalter, Niklaus.10aIsolation and characterization of New Drosophila Tyrosine Kinase Genes. The development of a new method to introduce mutations in cloned genes /cNiklaus Walter.  aZurich :bUniversitat Zurich,c1992.  a[4], 82, [1] s. :bil. , rys. , tab. ;c21 cm.