mycoplasma capricolum , a procaryotic sterol and fatty acid auxotroph , contains a large number of membrane proteins covalently modified by both saturated and unsaturated fatty acids ( dahl , c.e. , dahl , j.s. , and bloch , k. ( 1983 ) j. biol . chem . 258 , 11814-11818 ) .
C0015684
fatty acid
C0015690
unsaturated fatty acids