Catalysis of the template-independent extension of the 3'- end of an RNA strand by addition of one adenosine molecule at a time. Cannot initiate a chain 'de novo'. The primer, depending on the source of the enzyme, may be an RNA, or oligo(A) bearing
Catalysis of the template-independent extension of the 3'- end of an RNA strand by addition of one adenosine molecule at a time. Cannot initiate a chain 'de novo'. The primer, depending on the source of the enzyme, may be an RNA, or oligo(A) bearing (en)