DNA polymerases from intracisternal A-type particles on the mouse plasmacytoma MPC 11

Intracisternal A particles from mouse plasma cell tumors were isolated from microsomal vesiclels by detergent treatment and separated in linear sucrose gradients. Four peaks of DNA polymerase activities banding at densities of 1.30, 1.24, 1.20--1.22 and 1.13 g/cm3 were observed assaying on poly(rA).oligo(dT). Solubolized DNA polymerases of the 1.30 g/cm3...