ribosomal rna ( rrna ) sequence homology ( as determined by comparisons of t1 oligonucleotide catalogs of 32p-labeled 16s rrnas ) has been used to assess phylogenetic relationships within the filamentous and unicellular blue-green bacteria , and to identify regions of evolutionary conservatism within blue-green bacterial 16s rrnas .
C0035553
ribosomal
C3537372
bacterial 16s rrnas