FCGR2B
Encyclopedia
Low affinity immunoglobulin gamma Fc region receptor II-b is a protein
Protein
Proteins are biochemical compounds consisting of one or more polypeptides typically folded into a globular or fibrous form, facilitating a biological function. A polypeptide is a single linear polymer chain of amino acids bonded together by peptide bonds between the carboxyl and amino groups of...

 that in humans is encoded by the FCGR2B gene
Gene
A gene is a molecular unit of heredity of a living organism. It is a name given to some stretches of DNA and RNA that code for a type of protein or for an RNA chain that has a function in the organism. Living beings depend on genes, as they specify all proteins and functional RNA chains...

. Mutation in the gene in humans leads to a lupus phenotype. The cytoplasmic part of this receptor contains an immunoreceptor tyrosine-based inhibitory motif
Immunoreceptor tyrosine-based inhibitory motif
An immunoreceptor tyrosine-based inhibition motif , is a conserved sequence of amino acids that is found in the cytoplasmic tails of many inhibitory receptors of the immune system...

.

Further reading

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