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Oncogene. 1994 Nov;9(11):3241-7.

LERK-2, a binding protein for the receptor-tyrosine kinase ELK, is evolutionarily conserved and expressed in a developmentally regulated pattern.

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Immunex Research and Development Corporation, Seattle, Washington 98101.


We have isolated and characterized cDNA clones that encode the rat homologue of a binding protein, LERK-2, for the receptor tyrosine kinase, elk. The cDNAs contain an open reading frame of 1527 nucleotides capable of encoding a protein 345 amino acid residues in length. The nucleotide sequence of the present clones is > 90% identical to the previously identified human LERK-2 cDNA, and the predicted proteins encoded by the rat and human clones are identical at 95% of amino acid residues. Recombinant proteins expressed from the rat cDNAs bind to elk with high affinity, similar to recombinant human LERK-2 and an endogenously-expressed rat elk-binding protein. Expression of the rat LERK-2 mRNA was detected in embryonic brain, kidney, lung, skeletal muscle, thymus, liver, and heart, and diminished in the early post-natal period. Significant LERK-2 mRNA expression in the young adult rat was restricted to the lung, kidney, heart and testes.

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