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  • Title: Cloning and expression of novel isoforms of 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase from bovine heart.
    Author: Vidal H, Crepin KM, Rider MH, Hue L, Rousseau GG.
    Journal: FEBS Lett; 1993 Sep 20; 330(3):329-33. PubMed ID: 8397106.
    Abstract:
    Distinct 6-phosphofructo-2-kinase (PFK-2)/fructose 2,6-bisphosphatase (FBPase-2) cDNAs were cloned from bovine heart, showing that PFK-2/FBPase-2 gene B, which contains 16 exons, codes for at least five mRNAs. Three of them (B1, B2, B4) could encode the 58,000-M(r) isozyme. In B2 mRNA, exon 15 encodes four more residues than in B1. In B4 mRNA, exon 15 encodes six more residues than in B1, but exon 16 (20 residues) is missing. B3 mRNA corresponds to the 54,000-M(r) isozyme. It lacks exon 15 and also differs from the other mRNAs in the 5' noncoding region. B5 mRNA encodes a truncated form. When expressed in E. coli, the recombinant isoforms corresponding to all these mRNAs except B5 exhibited PFK-2 activity.
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