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An ANA test is a blood test that looks for antinuclear antibodies in your blood. Antibodies are proteins that your immune system makes to fight foreign substances, like viruses and bacteria. But an antinuclear antibody attacks your healthy cells instead. It's called "antinuclear" because it targets the nucleus of the cells, which is in charge of sending signals that are needed for important cell functions.

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Article

Analysis of human chorionic gonadotropin glycoforms by nano-liquid chromatography-mass spectrometry: novel strategies based on mobile phase additive and adduct dissociation.

Research record from Anal Bioanal Chem, 2026-06-20. PMID 42321409.

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Analysis of Human Placental Tissues Using Gas Chromatography High Resolution Accurate Mass Spectrometry to Characterize Exposure to a Range of Semivolatile Organic Compounds.

Research record from Expo Health, 2026-07-24. PMID 42502272.

Glossary Term

Analysis of Variance

A statistical technique which helps in making inference whether three or more samples might come from populations having the same mean; specifically, whether the differences among the samples might be caused by chance variation.

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Tests

Anion Gap Blood Test

An anion gap blood test gives a measurement of the acid-base balance (pH balance) in your blood. This lets you know whether your blood is too acidic or not acidic enough. The test also checks for an electrolyte imbalance in your blood. To do the measurement, an anion gap test uses the results of an electrolyte panel or other blood tests that measure your electrolytes.

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