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Hum Genet. 1997 Jan;99(1):138-41.

The IGHG3 gene shows a structural polymorphism characterized by different hinge lengths: sequence of a new 2-exon hinge gene.

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1
Département d'Anthropologie et d'Ecologie, Université de Genève, Switzerland.

Abstract

Four of the five human IGHG genes (G1, GP, G2, and G4) display a hinge region consisting of a unique exon. In contrast, IGHG3 exhibits a different structure in which the hinge is constituted by four or, less frequently, three exons. We report here the nucleotide sequence of a new 2-exon hinge G3 gene found in a Mandenka individual from Eastern Senegal. A comparison of this sequence with that of 4-exon and 3-exon hinge G3 genes suggests that the 3-exon and 2-exon hinge forms arose independently by deletion events in a 4-exon hinge gene.

PMID:
9003512
[Indexed for MEDLINE]
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