THE PURSER WELLNESS ENCYCLOPEDIA

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Gene referenceSep 23, 2026

GSTO1

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… glutathione S-transferases. These enzymes participate in redox chemistry, with roles that differ from the better-known GSTM1 and GSTP1 pathways. Also called: Glutathione S-Transferase Omega 1 An omega-family glutathione enzyme GSTO1 belong…

Gene referenceSep 23, 2026

GSTP1

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GSTP1 helps your body use glutathione to process some compounds. Also called: Glutathione S-Transferase Pi 1 Using glutathione in conjugation GSTP1 belongs to the glutathione transferase family. These enzymes use glutathione in conjugation …

Gene referenceSep 23, 2026

GSTT1

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GSTT1 helps your body use glutathione to process some compounds. Also called: Glutathione S-Transferase Theta 1, GSTT Using glutathione in conjugation GSTT1 belongs to the glutathione transferase family. These enzymes use glutathione in con…

Gene referenceSep 23, 2026

HDC

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HDC is the gene name for Histidine Decarboxylase. Learn what a specific result could mean and what to ask about it. Also called: Histidine Decarboxylase Histamine production is one part of the circuit HDC is involved in the enzyme step conv…

Gene referenceSep 23, 2026

HFE

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…late iron absorption through signaling that influences hepcidin. The commonly discussed C282Y and H63D variants correspond to rs1800562 and rs1799945. Their implications depend on the combination present and clinical findings. Also called: …

Gene referenceSep 23, 2026

HLA-DQA1

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HLA-DQA1 contributes to an HLA-DQ protein that presents antigen fragments to CD4 T cells. HLA-DQ function depends on pairing with an HLA-DQB chain, so an isolated marker is not a complete HLA type. Also called: HLADQA1, Human Leukocyte Anti…

Gene referenceSep 23, 2026

HLA-DQA2

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HLA-DQA2 is part of the HLA class II region involved in immune recognition. It should not be treated as interchangeable with HLA-DQA1 or as a measurement of how well the immune system fights infections. Also called: HLADQA2, Human Leukocyte…

Gene referenceSep 23, 2026

HRH1

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…for Histamine Receptor H1. Learn what a specific result could mean and what to ask about it. Also called: Histamine Receptor H1 Receiving the histamine signal The Purser genetics reference places HRH1 in the histamine-response part of the M…

Gene referenceSep 23, 2026

HRH2

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…for Histamine Receptor H2. Learn what a specific result could mean and what to ask about it. Also called: Histamine Receptor H2 Histamine also connects to stomach acid Dr. Purser’s genetics reference connects HRH2 with histamine signaling a…

Gene referenceSep 23, 2026

IL21

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IL21 encodes a cytokine involved in regulating lymphocytes, including B-cell responses. It sits within an immune network that connects T-cell help, antibody responses and inflammatory activity. Also called: IL-21, Interleukin 21 A link betw…

Gene referenceSep 23, 2026

IL23R

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IL23R encodes part of the receptor that receives IL-23 signals. This connects the gene to the maintenance of Th17-related immune responses, which differ from the Th2 patterns discussed in allergy. Also called: IL-23R, Interleukin 23 Recepto…

Gene referenceSep 23, 2026

IL6

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IL6 encodes interleukin-6, a cytokine involved in immune responses and acute-phase signaling. It can appear in discussions of infection, chronic inflammation and metabolic health, with effects that depend on the context. Also called: IL-6, …

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