a protein part of lymphocyte function-associated antigen 1 and so involved in cellular adhesion and costimulatory signaling in the human immune system.

a transmembrane (type I) heparan sulfate proteoglycan, participating in cell proliferation, migration and cell-matrix interactions.

a protein forming part of the B-cell antigen receptor (BCR), associated with agammaglobulinemia-3

a transmembrane receptor expressed on blood cells of myeloid lineage, though also found on some lymphoid cells

a type II integral membrane protein on small intestinal and renal tubular epithelial cells, macrophages, granulocytes, and synaptic membranes from the CNS.

a C-type lectin acting as receptor for IgE, found on mature B cells, activated macrophages, eosinophils, follicular dendritic cells, and platelets

a costimulatory protein found on antigen presenting cells and required for their activation by CD154 of T_H cells, with deficiency of CD40 possibly leading to hyper-IgM syndrome type 3.

a zinc-dependent metalloprotease, expressed in a wide variety of tissues, especially in kidney and on pre-B lymphocytes

a factor on platelets that helps bind von Willebrand factor, hence facilitating platelet adhesion and plug formation at sites of vascular injury.

a cell surface glycoprotein which is typically expressed on endothelial and immune system cells, exploited by human rhinovirus as a receptor for cellular entry.