Ribosomal protein L21 leader

This family is a putative r-protein leader autoregulatory structure found in B. subtilis and other low-GC Gram-positive bacteria. It is located in the 5' untranslated regions of mRNAs encoding ribosomal protein L21, a protein of unknown function, and ribosomal protein L27 (rplU-ysxB-rpmA).