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Title: Molecular evidence of triplication in the haptoglobin Johnson variant gene.
Authors: Oliviero, Salvatore 
M., De Marchi
A. O., Carbonara
L. F., Bernini
G., Bensi
G., Raugei
Issue Date: 1985
Project: None 
The protein and gene structure of the Hp Johnson variant (Hp3) were analyzed in two related heterozygous individuals. The molecular weight (23 kd) and amino acid composition of Hp3 alpha chain were in agreement with the triplicated structure first suggested by Smithies in 1964. Direct gene analysis by Southern blotting showed a three-fold tandem repeat of the same 1.7 kb DNA segment implicated in the Hp2 gene duplication. On the basis of these data a nine exon model for the Hp3 gene is proposed.
ISSN: 0340-6717
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