when incubated with a soluble extract from large oocytes of xenopus laevis , recombinant dna plasmids containing either x. laevis oocyte 5s dna or x. borealis oocyte 5s dna direct the synthesis of discrete 5s rnas , which by size and sequence analysis are similar or identical to the corresponding 5s rnas synthesized in vivo .
C0012931
recombinant dna
C0012854
dna