JOURNAL ARTICLE

Molecular cloning of Kunitz-type proteinase inhibitor group B genes from potato

A S Speranskaya, A A Krinitsina, P Poltronieri, P Fasano, A Santino, A B Shevelev, T A Valueva
Biochemistry. Biokhimii︠a︡ 2005, 70 (3): 292-9
15823083
Eighteen clones representing copies of four Kunitz-type proteinase inhibitor group B genes (PKPI-B) obtained by polymerase chain reaction cloning of potato (Solanum tuberosum L. cv. Istrinskii) genomic DNA were sequenced and analyzed. Three new genes were found and named PKPI-B1, PKPI-B2, and PKPI-B10: these were represented by five, two, and seven clones, respectively. The remaining four clones corresponded to the formerly characterized PKPI-B9 gene. These data show that at least four PKPI-B encoding genes are harbored in the genome of potato cv. Istrinskii. Their analysis suggests that variability of PKPI-B encoding genes in potato is limited and could be explained by cross-hybridization events in the ancestor forms rather than by random mutagenesis.

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