title: Porphobilinogen deaminase in human erythrocytes: purification of two forms with apparent molecular weights of 40 kDa and 42 kDa.
abstract: Porphobilinogen deaminase was purified from human erythrocytes by ion-exchange chromatography, gel filtration and hydrophobic interaction chromatography. Two forms of the enzyme were isolated, with apparent molecular weights of 40 kDa and 42 kDa, and in relative amounts of 85% and 15%, respectively. Both forms were found to have an N-terminal amino acid sequence identical to that published for the erythropoietic form of porphobilinogen deaminase, as deduced from a cDNA clone. The two forms present could each be separated into three differently charged subforms by Mono Q chromatography.
authors.affiliation: Department of Psychiatry, St. Göran's Hospital, Stockholm, Sweden.
authors.forename: L
authors.initials: L
authors.lastname: Lannfelt
authors.forename: L
authors.initials: L
authors.lastname: Wetterberg
authors.forename: L
authors.initials: L
authors.lastname: Lilius
authors.forename: S
authors.initials: S
authors.lastname: Thunell
authors.forename: H
authors.initials: H
authors.lastname: Jörnvall
authors.forename: B
authors.initials: B
authors.lastname: Pavlu
authors.forename: A
authors.initials: A
authors.lastname: Wielburski
authors.forename: P
authors.initials: P
authors.lastname: Gellerfors
mesh_terms: D000595:Amino Acid Sequence; D000642:Ammonia-Lyases / Q000302:isolation & purification*; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D004912:Erythrocytes / Q000201:enzymology*; D006801:Humans; D011163:Hydroxymethylbilane Synthase / Q000302:isolation & purification*; D007525:Isoelectric Focusing; D008970:Molecular Weight
chemical_list: D011163:Hydroxymethylbilane Synthase; D000642:Ammonia-Lyases