Reverse transcriptase associated with A-type particles from murine myeloma cells

Abstract

Our findings may be summarized as follows: (a) a DNA polymerase is associated with murine type A particles, which is very similar to the reverse transcriptases found in true RNA tumor viruses; (b) the majority of the RNA isolated from A particles is of low molecular weight (probably due to degradation), byt appears to contain an amount of unique sequence information comparable to that found in other oncornavirus particles. These results suggest that A-type particles may be very similar, and perhaps related, to the two other classes (B and C) of oncornaviruses.