endonucleolytic cleaveage between SSU-rRNA and LSU-rRNA of tetracistronic rRNA transcript (SSU-rRNA, LSU-rRNA, 4.5S-rRNA, 5S-rRNA)
endonucleolytic cleaveage between ssu-rrna and lsu-rrna of tetracistronic rrna transcript (ssu-rrna, lsu-rrna, 4.5s-rrna, 5s-rrna)