Binds directly to 23S ribosomal RNA and is necessary for the in vitro assembly process of the 50S ribosomal subunit. It is not involved in the protein synthesizing functions of that subunit (By similarity). 118 MARVKRGVIARRRHKKILKLAKGYYGARSRVFRVAKQAVIKAGQYAYRDRRQRKRQFRALWIARINAGDRQNGLSYSRLIAGLKKATIEIDRKVLSDLAVNEKAAFAAIVEKAKAVLA RL20_AZOVI rplT 50S ribosomal protein L20