{TAIL ~ The Salmonella typhimurium homolog}, {HEAD ~ CobB}, can substitute for CobT as a phosphoribosyl transferase during cobalamin biosynthesis  
{ TAIL ~ The Salmonella typhimurium homolog } , { HEAD ~ CobB } , can substitute for CobT as a phosphoribosyl transferase during cobalamin biosynthesis
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH