THE PURSER WELLNESS LIBRARY

Let’s explore 1,25-dihydroxyvitamin D — lab reference

A COURSE FOR YOUR CURIOSITYGetting to know your micronutrients

5 chapters, at your pace

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555 discoveries for your curiosity21 matching listings grouped; alternative sources stay available.

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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, …

Gene referenceSep 23, 2026

KIT

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KIT encodes a receptor tyrosine kinase that responds to stem cell factor. It participates in blood-cell development and mast-cell biology, making the exact variant and testing context especially important. Also called: Kit Proto-Oncogene A …

Gene referenceSep 23, 2026

MAOA

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Dr. Also called: MAO-A, Monoamine Oxidase A Neurotransmitter breakdown in context Dr. Purser places MAOA in the neurotransmitter-breakdown part of his brain-chemistry map. The teaching connects it with mood, sleep and medication sensitivity…

Gene referenceSep 23, 2026

MAOB

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MAOB encodes monoamine oxidase B, an enzyme involved in breaking down monoamine compounds, including dopamine. It does not simply build dopamine, and a DNA marker is not a neurotransmitter measurement. Also called: MAO-B, Monoamine Oxidase …

Gene referenceSep 23, 2026

MMP3

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MMP3 encodes matrix metalloproteinase 3, an enzyme involved in breaking down components of the extracellular matrix. Controlled remodeling is part of repair, while excess activity can accompany inflammatory tissue damage. Also called: Matri…

Gene referenceSep 23, 2026

MTHFR

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Makes an enzyme that helps produce a form of folate used in the processing of homocysteine. Common variants are different from rare variants that cause severe MTHFR deficiency. Also called: Methylenetetrahydrofolate Reductase, C677T, A1298C…

Gene referenceSep 23, 2026

MTR

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Makes the methionine synthase enzyme, which uses vitamin B12 in the conversion of homocysteine to methionine. Also called: Methionine Synthase The B12-dependent step In Dr. Purser’s teaching map, MTR is the B12-dependent step that converts …

Gene referenceSep 23, 2026

MTRR

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…s maintain the activity of methionine synthase, connecting B12-related chemistry with homocysteine metabolism. Also called: Methionine Synthase Reductase Keeping the remethylation system working Dr. Purser teaches MTRR alongside MTR because…

Gene referenceSep 23, 2026

NAT2

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NAT2 encodes N-acetyltransferase 2, which helps process certain drugs and other compounds. Combinations of variants can influence acetylation status; one SNP usually does not tell the entire story. Also called: N-Acetyltransferase 2 Acetyla…

Gene referenceSep 23, 2026

NOS3

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NOS3 encodes endothelial nitric oxide synthase, which helps blood vessels generate nitric oxide, a signal involved in vascular relaxation. This pathway is distinct from a blood pressure measurement or a diagnosis of vascular disease. Also c…

Gene referenceSep 23, 2026

NR3C2

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NR3C2 encodes the mineralocorticoid receptor, which responds to hormones such as aldosterone and helps regulate salt and fluid balance. It is distinct from the NR3C1 glucocorticoid receptor. Also called: Mineralocorticoid Receptor / Nuclear…

Gene referenceSep 23, 2026

NTRK2

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NTRK2 encodes TrkB, a receptor involved in responding to neurotrophic signals such as BDNF. These signals support nervous-system function and plasticity. NTRK2 is not a phosphatidylserine absorption transporter. Also called: Neurotrophic Re…

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