[Uniprot: P50336](http://www.uniprot.org/uniprot/P50336)

[OMIM: Entry 176200](http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=176200)

Brenner DA, Bloomer JR: The enzymatic defect in variegate prophyria. Studies with human cultured skin fibroblasts. N Engl J Med. 1980 Apr 3;302(14):765-9. doi: 10.1056/NEJM198004033021401.

Coakley J, Hawkins R, Crinis N, McManus J, Blake D, Nordmann Y, Sloan L, Connelly J: An unusual case of variegate porphyria with possible homozygous inheritance. Aust N Z J Med. 1990 Aug;20(4):587-9.

Deybach JC, Puy H, Robreau AM, Lamoril J, Da Silva V, Grandchamp B, Nordmann Y: Mutations in the protoporphyrinogen oxidase gene in patients with variegate porphyria. Hum Mol Genet. 1996 Mar;5(3):407-10.

Norris PG, Elder GH, Hawk JL: Homozygous variegate porphyria: a case report. Br J Dermatol. 1990 Feb;122(2):253-7.

von und zu Fraunberg M, Timonen K, Mustajoki P, Kauppinen R: Clinical and biochemical characteristics and genotype-phenotype correlation in Finnish variegate porphyria patients. Eur J Hum Genet. 2002 Oct;10(10):649-57. doi: 10.1038/sj.ejhg.5200860.

Hofmann C, Schmidt D, Braun-Falco O: [Porphyria variegata (author's transl)]. MMW Munch Med Wochenschr. 1975 Dec 12;117(50):1969-74.

Lehninger, A.L. Lehninger principles of biochemistry (4th ed.)  (2005). New York: W.H Freeman.

Salway, J.G. Metabolism at a glance (3rd ed.) (2004). Alden, Mass.: Blackwell Pub.

Bishop DF: Two different genes encode delta-aminolevulinate synthase in humans: nucleotide sequences of cDNAs for the housekeeping and erythroid genes. Nucleic Acids Res. 1990 Dec 11;18(23):7187-8. doi: 10.1093/nar/18.23.7187.

Bawden MJ, Borthwick IA, Healy HM, Morris CP, May BK, Elliott WH: Sequence of human 5-aminolevulinate synthase cDNA. Nucleic Acids Res. 1987 Oct 26;15(20):8563. doi: 10.1093/nar/15.20.8563.

Gerhard DS, Wagner L, Feingold EA, Shenmen CM, Grouse LH, Schuler G, Klein SL, Old S, Rasooly R, Good P, Guyer M, Peck AM, Derge JG, Lipman D, Collins FS, Jang W, Sherry S, Feolo M, Misquitta L, Lee E, Rotmistrovsky K, Greenhut SF, Schaefer CF, Buetow K, Bonner TI, Haussler D, Kent J, Kiekhaus M, Furey T, Brent M, Prange C, Schreiber K, Shapiro N, Bhat NK, Hopkins RF, Hsie F, Driscoll T, Soares MB, Casavant TL, Scheetz TE, Brown-stein MJ, Usdin TB, Toshiyuki S, Carninci P, Piao Y, Dudekula DB, Ko MS, Kawakami K, Suzuki Y, Sugano S, Gruber CE, Smith MR, Simmons B, Moore T, Waterman R, Johnson SL, Ruan Y, Wei CL, Mathavan S, Gunaratne PH, Wu J, Garcia AM, Hulyk SW, Fuh E, Yuan Y, Sneed A, Kowis C, Hodgson A, Muzny DM, McPherson J, Gibbs RA, Fahey J, Helton E, Ketteman M, Madan A, Rodrigues S, Sanchez A, Whiting M, Madari A, Young AC, Wetherby KD, Granite SJ, Kwong PN, Brinkley CP, Pearson RL, Bouffard GG, Blakesly RW, Green ED, Dickson MC, Rodriguez AC, Grimwood J, Schmutz J, Myers RM, Butterfield YS, Griffith M, Griffith OL, Krzywinski MI, Liao N, Morin R, Palmquist D, Petrescu AS, Skalska U, Smailus DE, Stott JM, Schnerch A, Schein JE, Jones SJ, Holt RA, Baross A, Marra MA, Clifton S, Makowski KA, Bosak S, Malek J: The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). Genome Res. 2004 Oct;14(10B):2121-7. doi: 10.1101/gr.2596504.

Zhao Y, Wang L, Shen HB, Wang ZX, Wei QY, Chen F: Association between delta-aminolevulinic acid dehydratase (ALAD) polymorphism and blood lead levels: a meta-regression analysis. J Toxicol Environ Health A. 2007 Dec;70(23):1986-94. doi: 10.1080/15287390701550946.

Wetmur JG, Kaya AH, Plewinska M, Desnick RJ: Molecular characterization of the human delta-aminolevulinate dehydratase 2 (ALAD2) allele: implications for molecular screening of individuals for genetic susceptibility to lead poisoning. Am J Hum Genet. 1991 Oct;49(4):757-63.

Wetmur JG, Bishop DF, Cantelmo C, Desnick RJ: Human delta-aminolevulinate dehydratase: nucleotide sequence of a full-length cDNA clone. Proc Natl Acad Sci U S A. 1986 Oct;83(20):7703-7. doi: 10.1073/pnas.83.20.7703.

Raich N, Romeo PH, Dubart A, Beaupain D, Cohen-Solal M, Goossens M: Molecular cloning and complete primary sequence of human erythrocyte porphobilinogen deaminase. Nucleic Acids Res. 1986 Aug 11;14(15):5955-68. doi: 10.1093/nar/14.15.5955.

Grandchamp B, De Verneuil H, Beaumont C, Chretien S, Walter O, Nordmann Y: Tissue-specific expression of porphobilinogen deaminase. Two isoenzymes from a single gene. Eur J Biochem. 1987 Jan 2;162(1):105-10. doi: 10.1111/j.1432-1033.1987.tb10548.x.

Yoo HW, Warner CA, Chen CH, Desnick RJ: Hydroxymethylbilane synthase: complete genomic sequence and amplifiable polymorphisms in the human gene. Genomics. 1993 Jan;15(1):21-9. doi: 10.1006/geno.1993.1005.

Tsai SF, Bishop DF, Desnick RJ: Human uroporphyrinogen III synthase: molecular cloning, nucleotide sequence, and expression of a full-length cDNA. Proc Natl Acad Sci U S A. 1988 Oct;85(19):7049-53. doi: 10.1073/pnas.85.19.7049.

Aizencang G, Solis C, Bishop DF, Warner C, Desnick RJ: Human uroporphyrinogen-III synthase: genomic organization, alternative promoters, and erythroid-specific expression. Genomics. 2000 Dec 1;70(2):223-31. doi: 10.1006/geno.2000.6373.

Ota T, Suzuki Y, Nishikawa T, Otsuki T, Sugiyama T, Irie R, Wakamatsu A, Hayashi K, Sato H, Nagai K, Kimura K, Makita H, Sekine M, Obayashi M, Nishi T, Shibahara T, Tanaka T, Ishii S, Yamamoto J, Saito K, Kawai Y, Isono Y, Nakamura Y, Nagahari K, Murakami K, Yasuda T, Iwayanagi T, Wagatsuma M, Shiratori A, Sudo H, Hosoiri T, Kaku Y, Kodaira H, Kondo H, Sugawara M, Takahashi M, Kanda K, Yokoi T, Furuya T, Kikkawa E, Omura Y, Abe K, Kamihara K, Katsuta N, Sato K, Tanikawa M, Yamazaki M, Ninomiya K, Ishibashi T, Yamashita H, Murakawa K, Fujimori K, Tanai H, Kimata M, Watanabe M, Hiraoka S, Chiba Y, Ishida S, Ono Y, Takiguchi S, Watanabe S, Yosida M, Hotuta T, Kusano J, Kanehori K, Takahashi-Fujii A, Hara H, Tanase TO, Nomura Y, Togiya S, Komai F, Hara R, Takeuchi K, Arita M, Imose N, Musashino K, Yuuki H, Oshima A, Sasaki N, Aotsuka S, Yoshikawa Y, Matsunawa H, Ichihara T, Shiohata N, Sano S, Moriya S, Momiyama H, Satoh N, Takami S, Terashima Y, Suzuki O, Nakagawa S, Senoh A, Mizoguchi H, Goto Y, Shimizu F, Wakebe H, Hishigaki H, Watanabe T, Sugiyama A, Takemoto M, Kawakami B, Yamazaki M, Watanabe K, Kumagai A, Itakura S, Fukuzumi Y, Fujimori Y, Komiyama M, Tashiro H, Tanigami A, Fujiwara T, Ono T, Yamada K, Fujii Y, Ozaki K, Hirao M, Ohmori Y, Kawabata A, Hikiji T, Kobatake N, Inagaki H, Ikema Y, Okamoto S, Okitani R, Kawakami T, Noguchi S, Itoh T, Shigeta K, Senba T, Matsumura K, Nakajima Y, Mizuno T, Morinaga M, Sasaki M, Togashi T, Oyama M, Hata H, Watanabe M, Komatsu T, Mizushima-Sugano J, Satoh T, Shirai Y, Takahashi Y, Nakagawa K, Okumura K, Nagase T, Nomura N, Kikuchi H, Masuho Y, Yamashita R, Nakai K, Yada T, Nakamura Y, Ohara O, Isogai T, Sugano S: Complete sequencing and characterization of 21,243 full-length human cDNAs. Nat Genet. 2004 Jan;36(1):40-5. doi: 10.1038/ng1285. Epub 2003 Dec 21.

Moran-Jimenez MJ, Ged C, Romana M, Enriquez De Salamanca R, Taieb A, Topi G, D'Alessandro L, de Verneuil H: Uroporphyrinogen decarboxylase: complete human gene sequence and molecular study of three families with hepatoerythropoietic porphyria. Am J Hum Genet. 1996 Apr;58(4):712-21.

Romeo PH, Raich N, Dubart A, Beaupain D, Pryor M, Kushner J, Cohen-Solal M, Goossens M: Molecular cloning and nucleotide sequence of a complete human uroporphyrinogen decarboxylase cDNA. J Biol Chem. 1986 Jul 25;261(21):9825-31.

Delfau-Larue MH, Martasek P, Grandchamp B: Coproporphyrinogen oxidase: gene organization and description of a mutation leading to exon 6 skipping. Hum Mol Genet. 1994 Aug;3(8):1325-30. doi: 10.1093/hmg/3.8.1325.

Puy H, Robreau AM, Rosipal R, Nordmann Y, Deybach JC: Protoporphyrinogen oxidase: complete genomic sequence and polymorphisms in the human gene. Biochem Biophys Res Commun. 1996 Sep 4;226(1):226-30. doi: 10.1006/bbrc.1996.1337.

Whatley SD, Puy H, Morgan RR, Robreau AM, Roberts AG, Nordmann Y, Elder GH, Deybach JC: Variegate porphyria in Western Europe: identification of PPOX gene mutations in 104 families, extent of allelic heterogeneity, and absence of correlation between phenotype and type of mutation. Am J Hum Genet. 1999 Oct;65(4):984-94. doi: 10.1086/302586.

Nishimura K, Taketani S, Inokuchi H: Cloning of a human cDNA for protoporphyrinogen oxidase by complementation in vivo of a hemG mutant of Escherichia coli. J Biol Chem. 1995 Apr 7;270(14):8076-80. doi: 10.1074/jbc.270.14.8076.

Levi S, Corsi B, Bosisio M, Invernizzi R, Volz A, Sanford D, Arosio P, Drysdale J: A human mitochondrial ferritin encoded by an intronless gene. J Biol Chem. 2001 Jul 6;276(27):24437-40. doi: 10.1074/jbc.C100141200. Epub 2001 Apr 25.

Langlois d'Estaintot B, Santambrogio P, Granier T, Gallois B, Chevalier JM, Precigoux G, Levi S, Arosio P: Crystal structure and biochemical properties of the human mitochondrial ferritin and its mutant Ser144Ala. J Mol Biol. 2004 Jul 2;340(2):277-93. doi: 10.1016/j.jmb.2004.04.036.