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  • Title: Gene structure and chromosomal localization of the murine lamin B2 gene.
    Author: Zewe M, Höger TH, Fink T, Lichter P, Krohne G, Franke WW.
    Journal: Eur J Cell Biol; 1991 Dec; 56(2):342-50. PubMed ID: 1802718.
    Abstract:
    The structure of the murine lamin B2 gene has been analyzed by cloning, sequencing and hybridization techniques, including in situ hybridization. The gene exists in single copy on the distal arm of chromosome 10 and comprises at least 15 kb, containing 12 exons and 11 introns. The transcriptional start point, as determined by primer extension analysis and RNase protection, was mapped to the region -264 to -254 upstream the ATG start codon. The 5' upstream region does not reveal any classical TATA box elements but typical features of genes encoding "housekeeping" proteins. The intron pattern is strikingly similar to those of the Xenopus laevis lamin LIII (Döring, V., R. Stick, EMBO J. 9, 4073-4081 (1990)) and of the intermediate filament protein of the invertebrate Helix aspersa (Dodemont, H., D. Riemer, K. Weber, EMBO J. 9, 4083-4094 (1990], particularly in the central rod and in the tail domains. Moreover, this lamin gene contains an additional intron in the region encoding the rod domain. Our data are compatible with the evolutionary hypothesis that IF proteins have evolved from a lamin-like ancestor molecule.
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