purine rich small `` '' rna-primer '' '' molecules ( about 10-12 nucleotides ) , secreted into the growth medium of 3-h germinated conidia of n. crassa , strongly stimulated a concentration-dependent in vitro dna synthesis of n. crassa slime mutant as well as dnas from the human cancer cells but did not affect that from normal cells .
C1327616
, secret
C0007634
normal cel