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Nucleic Acids Res. 1985 September 11; 13(17): 6387–6398.
PMCID: PMC321960

The human apolipoprotein AII gene: structural organization and sites of expression.


The complete nucleotide sequence of the human apolipoprotein All gene together with 911 bases of 5' flanking sequence and 687 bases of 3' flanking sequence have been determined. The mRNA coding region is interrupted by three introns of 169, 293 and 395bp. The Intro-exon structure of the apo All gene is similar to that of the apo AI, apo CIII and apo E genes: three introns separate 4 coding sequences specifying the 5' untranslated region, pre-peptide, a short N-terminal domain and a C-terminal domain composed of a variable number of lipid-binding amphipathic helices. Intron II carries a 33bp dG-dT repetitive element adjacent to the 3' splice junction which has the potential to adopt the Z-DNA conformation. The 5' and 3' terminuses of the mRNA have been identified by primer extension and S1 nuclease mapping. A number of short direct repeats are found in the 5' flanking region and an inverted repeat occurs between the CAAT and TATA boxes. Downstream of the the gene is an Alu family repeat containing a polymorphic MspI site, the deletion of which is associated with increased circulating levels of apoAII. ApoAII gene expression was demonstrated in adult human liver and HepG2 cells but not in human small intestine. Of ten Rhesus monkey tissues examined apo All mRNA was detected only in liver.

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