the organization of ribosomal protein genes and the gene ( fus ) for a protein chain elongation factor , ef g , in escherichia coli were studied with a merodiploid strain that has an episome with genetic markers , ery ( r ) , spc ( r ) , str ( r ) , and fus ( r ) , and a chromosome with markers ery ( s ) , spc ( s ) , str ( s ) , and fus ( s ) .
C0035552
ribosomal protein
C0033684
protein