Fig. 2: SSU architecture and protein splitting.

a The head protuberance (left) is built upon an extension of conserved uS10m that serves as a platform for newly bound mS114 and mS115. The body protuberance (right) is built upon an extension of uS4m that serves as a platform for newly bound mS109 and mS110. b Each one of the fragmented mitoribosomal proteins uS3m, uS4m, uS7m consists of two separate proteins (distinct colours for individual proteins) encoded in the nuclear genomes. Comparison with E. coli counterparts (white) illustrates the protein splitting phenomenon.