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Evidence from Subunit Molecular Weight Suggests Hybridization Was the Source of the Phosphoglucose Isomerase Gene Duplication in Clarkia

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Publisher Springer
Specialty Genetics
Date 2013 Nov 22
PMID 24257647
Citations 4
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Abstract

The apparent molecular weight of cytosolic phosphoglucose isomerase (PGI) subunits was evaluated in 18 species of Clarkia which have or do not have duplicated genes specifying this glycolytic enzyme. Species that lack the duplication had subunits of 59,000 or 60,400 whereas species with the duplication generally possessed two types of PGI subunits with these or closely similar molecular weights. The additive pattern in the species with the duplication suggests that the molecular weight divergence preceded the origin of the duplication, and that the duplication arose following hybridization between taxa that represented different lineages within Clarkia.

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