A low molecular weight DNA polymerase (DNA nucleotidyltransferase; EC 2.7.7.7) has been purified 265,000-fold from ovaries of the frogXertopus Zuevis. On polyacrylamide gels run under denaturing conditions the purified preparation exhibited one major band of approximately 45,000 molecular weight. The most purified fraction incorporated 380 pmol of dTMP/h/mg of protein at 26”. No endodeoxyribonu...

Colchicine forms a complex in vivo with a protein present in fertilized or unfertilized sea urchin eggs; similar binding was obtained in vitro with the soluble fraction from egg homogenates. Kinetic parameters and binding equilibrium constant were essentially the same in vivo and in vitro. The binding site protein was shown to have a sedimentation constant of 6S by zone centrifugation. The prot...

A low molecular weight DNA polymerase (DNA nucleotidyltransferase; EC 2.7.7.7) has been purified 265,000-fold from ovaries of the frogXertopus Zuevis. On polyacrylamide gels run under denaturing conditions the purified preparation exhibited one major band of approximately 45,000 molecular weight. The most purified fraction incorporated 380 pmol of dTMP/h/mg of protein at 26”. No endodeoxyribonu...

Colchicine forms a complex in vivo with a protein present in fertilized or unfertilized sea urchin eggs; similar binding was obtained in vitro with the soluble fraction from egg homogenates. Kinetic parameters and binding equilibrium constant were essentially the same in vivo and in vitro. The binding site protein was shown to have a sedimentation constant of 6S by zone centrifugation. The prot...

[1] Uppermost Cretaceous to Eocene marine sedimentary sequences occur both to the south and north of the Yarlung Zangbo suture in south central Tibet. They consist of Indian-margin strata of the northern Tethyan Himalaya and Asian-margin strata of the Gangdese forearc. Both assemblages are characterized by major changes in depositional environment and sedimentary provenance at 65 Ma and an appe...