5.4.99.19	16S rRNA uridine516	in vitro, the enzyme does not modify free 16S rRNA. The preferred substrate is a 5'-terminal fragment of 16S rRNA complexed with 30S ribosomal proteins, suggesting that pseudouridylation occurs at an intermediate stage of 30S assembly in vivo	Escherichia coli	16S rRNA pseudouridine516	-	?	406993	
5.4.99.19	16S rRNA uridine516	the enzyme is specific for uridine516 in 16S rRNA. In vitro, the enzyme does not modify free 16S rRNA. The preferred substrate is a 5'-terminal fragment of 16S rRNA complexed with 30S ribosomal proteins	Escherichia coli	16S rRNA pseudouridine516	-	?	406993