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CD68 immunostaining demonstrating macrophages and giant cells in a case of xanthogranulomatous pyelonephritis. CD68 (Cluster of Differentiation 68) is a protein highly expressed by cells in the monocyte lineage (e.g., monocytic phagocytes, osteoclasts), by circulating macrophages, and by tissue macrophages (e.g., Kupffer cells, microglia). [5]
a membrane protein present on many hemopoietic cells and fibroblasts that acts as a ligand for CD2 and may be involved in T-cell function. CD59: Membrane attack complex inhibition factor (MACIF); MAC-inhibitory protein (MAC-IP); Antigen MEM43; Protectin: Immune system complement cascade regulatory factor; Homologous restriction factor(HRF ...
CD14 is expressed mainly by macrophages and (at 10-times lesser extent) by neutrophils.It is also expressed by dendritic cells.The soluble form of the receptor (sCD14) is secreted by the liver and monocytes and is sufficient in low concentrations to confer LPS-responsiveness to cells not expressing CD14. mCD14 and sCD14 are also present on enterocytes.
Single-pass membrane proteins cross the membrane only once, while multi-pass membrane proteins weave in and out, crossing the membrane several times. Single pass membrane proteins can be categorized as Type I, which are positioned such that their carboxyl-terminus is towards the cytosol, or Type II, which have their amino-terminus towards the ...
A membrane transport protein is a membrane protein involved in the movement of ions, small molecules, and macromolecules, such as another protein, across a biological membrane. Transport proteins are integral transmembrane proteins ; that is they exist permanently within and span the membrane across which they transport substances.
Depending on the ligand bound, CD86 can signal for self-regulation and cell-cell association, or for attenuation of regulation and cell-cell disassociation. [6] The CD86 gene encodes a type I membrane protein that is a member of the immunoglobulin superfamily. [7] Alternative splicing results in two transcript variants encoding different ...
All three known members of the selectin family (L-, E-, and P-selectin) share a similar cassette structure: an N-terminal, calcium-dependent lectin domain, an epidermal growth factor (EGF)-like domain, a variable number of consensus repeat units (2, 6, and 9 for L-, E-, and P-selectin, respectively), a transmembrane domain (TM) and an intracellular cytoplasmic tail (cyto).
It is involved in the formation and transport of MHC class II peptide complexes for the generation of CD4+ T cell responses. [7] [8] The cell surface form of the invariant chain is known as CD74. CD74 is a cell surface receptor for the cytokine macrophage migration inhibitory factor (MIF). [9]