50S ribosomal protein L21; This protein binds to 23S rRNA in the presence of protein L20; Belongs to the bacterial ribosomal protein bL21 family.

Ribosomal large subunit pseudouridine synthase D; Responsible for synthesis of pseudouridine from uracil. Belongs to the pseudouridine synthase RluA family.

50S ribosomal protein L24; One of the proteins that surrounds the polypeptide exit tunnel on the outside of the subunit.

50S ribosomal protein L3; One of the primary rRNA binding proteins, it binds directly near the 3'-end of the 23S rRNA, where it nucleates assembly of the 50S subunit; Belongs to the universal ribosomal protein uL3 family.

Flavohemoprotein; Sulfite reductase, alpha subunit (flavoprotein).

Large subunit ribosomal protein L13; This protein is one of the early assembly proteins of the 50S ribosomal subunit, although it is not seen to bind rRNA by itself. It is important during the early stages of 50S assembly.

Exoribonuclease R.

Ribosomal protein L17.

Iojap-like Protein; Functions as a ribosomal silencing factor. Interacts with ribosomal protein L14 (rplN), blocking formation of intersubunit bridge B8. Prevents association of the 30S and 50S ribosomal subunits and the formation of functional ribosomes, thus repressing translation.