during our studies on the mechanisms controlling the accumulation of the poly ( a ) -containing rna sequences which occur with high and moderately high frequency in the cytoplasm of the lactating guinea pig mammary gland , it became apparent that > 75 % of the 20,000 or so poly ( a ) -containing nuclear rna sequences were not found in the cytoplasmic poly ( a ) -containing rna fraction .
C0035700
nuclear rna
C0035668
rna