title: Lowered levels of colicin Ia membrane receptors in an Escherichia coli mutant defective in heme biosynthesis.
abstract: Cells of an Escherichia coli mutant defective in heme biosynthesis (hemA) grown under conditions for respiration deficiency (grown in the absence of aminolevulinic acid) have 20% of the number of specific colicin Ia receptors found in cells of the same strain grown under conditions for respiration competency (grown in the presence of aminolevulinic acid).
mesh_terms: D000622:Aminolevulinic Acid / Q000378:metabolism; D001665:Binding Sites; D002462:Cell Membrane / Q000378:metabolism; D003087:Colicins / Q000378:metabolism*; D006418:Heme / Q000096:biosynthesis*; D009154:Mutation; D011485:Protein Binding; D014764:Viral Proteins / Q000096:biosynthesis
chemical_list: D003087:Colicins; D014764:Viral Proteins; D006418:Heme; D000622:Aminolevulinic Acid