Particulate DNA polymerase from the cytoplasm of [formula omitted] oocytes

Abstract

A DNA polymerase has been partially purified and characterized from Xenopus laevis stage 6 oocytes. The enzyme is present only in the cytoplasm and has been shown to be able to copy Poly(A). oligo(dT), to be sensitive to N-ethylmaleimide, and to sediment faster than 4 S in high salt glycerol gradient. The enzyme can be extracted from particulate material which has a density in sucrose gradient ranging from 1.200 to 1.225 g/cc. This particulate material is identified by its ability to use Poly(A). oligo(dT) as template in an exogenous DNA polymerase reaction and by its endogenous DNA synthesizing capacity.