Publications & Reports

Isolation and characterization of cDNA clones for mouse Ly-9.

Sandrin MS, Gumley TP, Henning MM, Vaughan HA, Gonez LJ, Trapani JA, McKenzie IF
Molecular Immunogenetics Laboratory, Austin Research Institute, Austin Hospital Heidelberg, Victoria, Australia.


We describe the production and characterization of a mouse mAb, S-450-33.2, recognizing the Ly-9.2 specificity. This mAb was used to purify Ly-9 molecules from lymphoid cell lines, and the amino-terminal amino acids were determined. The mAb was also used in a eukaryotic expression system, to isolate cDNA clones encoding Ly-9. Analysis of RNA showed that Ly-9 expression is lymphocyte specific, as determined by the presence of a single hybridizing 2.4-kb species found only in lymphoid cells. Genomic DNA analysis indicated that Ly-9 is encoded by a single-copy gene of 10 to 15 kb. The predicted polypeptide belongs to the Ig superfamily of cell surface molecules with four extracellular Ig-like domains, i.e., a non-disulfide-bonded V domain, a truncated C2 domain with two disulfide bonds, a second non-disulfide-bonded V domain, and a truncated C2 domain with two disulfide bonds (V-C2-V-C2). The sequence data also support the view that Ly-9 belongs to the subgroup of the Ig superfamily that includes Bcm-1, CD2, and LFA-3.


  • Journal: Journal of Immunology
  • Published: 01/09/1992
  • Volume: 149
  • Issue: 5
  • Pagination: 1636-1641