]> This term was made obsolete because it refers to a class of gene products and a biological process rather than a molecular function. To update annotations, consider biological_process term 'ribosome biogenesis and assembly ; GO:0042254' or its children and molecular_function term 'unfolded protein binding ; GO:0051082'. ribosomal chaperone activity OBSOLETE. Assists in the correct assembly of ribosomes or ribosomal subunits in vivo, but is not a component of the assembled ribosome when performing its normal biological function. PMID:12150913 GOC:jl molecular_function