Ribosomes are the sites in a cell in which protein synthesis takes place. Cells have many ribosomes, and the exact number depends on how active a particular cell is in synthesizing proteins.

The rRNA molecules fold into complex secondary and tertiary structures, forming domains and motifs that are essential for ribosome function. The rRNA structures also provide binding sites for ...

A CAT tail might tag an incomplete peptide as a target that should be destroyed. It might also signal that although synthesis has stalled, the ribosome’s basic machinery is intact, and that ribosome ...