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J Biol Chem. 1995 Mar 31;270(13):7176-82.

A new gene with sequence and structural similarity to the gene encoding human lysyl oxidase.

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Department of Surgery, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, New Brunswick 08903, USA.


We have isolated a number of recombinant clones from a human skin fibroblast cDNA library that contain extensive sequence homology to several coding domains within the human lysyl oxidase mRNA. Using one of these lysyl oxidase-like cDNAs, we obtained several overlapping genomic DNA recombinants. Restriction mapping and DNA sequence analysis revealed that the complete sequence of the lysyl oxidase-like mRNA was encoded by seven exons distributed throughout 25 kilobases of genomic DNA. Exons 2-6 encoded the region of greatest homology to lysyl oxidase. The size of these five exons, moreover, was exactly the same as the size of the corresponding exons within the lysyl oxidase gene. Northern blot analysis also revealed the concomitant appearance of lysyl oxidase and lysyl oxidase-like mRNA in several human tissues. It appears therefore that the genes encoding lysyl oxidase and a lysyl oxidase-like protein share a common evolutionary origin and may also be functionally related.

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