Leukocyte immunoglobulin-like receptors
Leukocyte immunoglobulin-like receptors (LIR) or CD85 have extracellular immunoglobulin domains.  LIR modulates a variety of immune cells.  LIR interacts with class I MHC molecules[1].  (PDB entry 1p7q). .
 Cytokine receptors
 TNF receptor superfamily
The extracellular domain of TNFR contains 2 to 6 cysteine-rich domains (CRD). The . The CRDs are involved in binding of TNF[2]. . Water molecules are shown as red spheres.
TRAIL-R2 is called DR5.  (1d0g).
 Colony-stimulating factor receptor
 Type I cytokine receptors
 Type II cytokine receptors
 Interferon receptors
 Interleukin receptors
Interleukin-20 receptor:
 Chemokine receptors, two of which acting as binding proteins for HIV (CXCR4 and CCR5). They are G protein-coupled receptors
 T-cell receptors