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<td bgcolor="#cccccc"><strong> CD44</strong></td>
<td bgcolor="#cccccc"> 85</td> <td bgcolor="#cccccc"> ECMR Ⅲ, H-CAM, HUTCH-1, Hermes, Lu, Pgp-1, gp85 </td> <td bgcolor="#cccccc"> Surface of most cell types </td> <td bgcolor="#cccccc"> Adhesion molecule mediating leukocyte attachment and homing to peripheral lymphoid organs and sites of inflammation </td>
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<td><strong> CD44R</strong></td>
<td> 85-250 in epithelial cells; 85-200 in lymphocytes</td> <td> CD44v, CD44v9; heterogenous group of CD44 variant isoforms designated by the variant exons that they include (v2-v10 in humans) </td> <td> Epithelial cells and monocytes (constitutively), activated leukocytes </td> <td> Possible role (particulary for CD44v6) in leukocyte attachment to and rolling on endothelial cells, homing to peripheral lymphoid organs and sites of inflammation </td>
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<td bgcolor="#cccccc"><strong> CD45</strong></td>
<td bgcolor="#cccccc"> 210, 220, 180, 200</td> <td bgcolor="#cccccc"> Leukocyte common antigen (LCA), T200, EC 3.1.3.4; many dofferent isoforms with different molecular weights, e.g..<br /> B220, CD45R, CD45RA, CD45RB, CD45RC, CD45RO </td> <td bgcolor="#cccccc"> All hematopoeitic cells; different isoforms characteristic of differentiated subsets of various hematopoeitic cells</td> <td bgcolor="#cccccc"> Essential role in T-and B-cell antigen-receptor-mediated activation; possible role in receptor-mediated activation in other leukocytes </td>
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