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Vet Immunol Immunopathol. 2002 Mar;85(3-4):233-9.

Partial cDNA sequences of bovine CD72 and CD166/ALCAM, ligands for SRCR-family accessory molecules CD5 and CD6.

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Program in Molecular and Cellular Biology, University of Massachusetts, Amherst, MA 01003, USA.


Accessory/co-stimulatory molecules on the surface of T cells are capable of regulating activation signals. Two of these, CD5 and CD6, are molecules from the scavenger receptor cysteine rich (SRCR) superfamily. Partial sequences for the ligands of these molecules, known as CD72 and CD166 (or ALCAM), respectively, are provided for Bos taurus in this communication. Using highly conserved regions between the corresponding human and mouse genes, primers were designed and reverse transcription polymerase chain reaction was used to generate cDNA from bovine PBMC RNA. cDNA clones of several hundred base pairs in length were created and sequenced. The results showed 81% homology between bovine and human CD72 nucleotide sequences and 93% homology for the CD166 sequences. Similar levels of homology are seen between the corresponding human and mouse cDNA sequences.

[Indexed for MEDLINE]

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