FCGR2B Gene

What is the FCGR2B gene?

FCGR2B encodes fc gamma receptor iib (cd32b), a protein involved in IgG inhibitory signaling / B cell regulation. It belongs to the Immune Signaling category and is part of the Immune System & Inflammation biological cluster. FCGR2B encodes FcγRIIb, the only inhibitory Fc receptor that dampens B cell and macrophage activation.

Biological role and pathway

FCGR2B is involved in the IgG inhibitory signaling / B cell regulation pathway, which plays a central role in regulating physiological processes relevant to immune defence, cellular energy, and systemic homeostasis. Genes within the Immune System & Inflammation cluster work together to maintain balanced function across interconnected biological systems.

Variants in genes within this pathway may influence an individual's predisposition to altered function in these systems — particularly under conditions of physiological stress such as viral infection or prolonged illness.

Known genetic variants

The following variants (SNPs) in the FCGR2B gene have been studied in relation to immune signaling and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

• rs1050501— FCGR2B variant
• rs3219018— FCGR2B variant

Conditions studied in relation to FCGR2B

Research into FCGR2B variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that FCGR2B causes or treats any condition.

Genetic insights from DNA data

Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may include FCGR2B and related genes in the immune system & inflammation pathway.

The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. Results are presented in plain English with appropriate scientific context, no medical jargon, no scare tactics. All results should be discussed with a qualified healthcare provider.

Related genes in the Immune System & Inflammation pathway

FCGR2B does not act in isolation. The following genes are functionally related and may be analysed together for a more complete picture of your genetic predispositions.

Frequently asked questions