IgG

American

Immunology.

immunoglobulin G: a class of circulating antibodies predominant in serum, produced by plasma cells and memory cells in response to pathogens and other foreign substances, able to pass through the placental wall to the fetal circulation to impart immune defense for the period of infancy.

Etymology

Origin of IgG

First recorded in 1960–65

Example Sentences

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IgG

"But IgG antibodies never cross the cell layers and they can never make it inside the cysts."

From Science Daily ● Nov. 19, 2025

None of these differences, like IgG which is also in human breast milk, is necessarily harmful to humans.

From Salon ● Jan. 19, 2024

To overcome this, the group led by professor Qiang Pan-Hammarström at Karolinska Institutet used genetic engineering to create IgA antibodies that bind to the SARS-CoV-2 spike protein in a similar way to the IgG antibodies.

From Science Daily ● Jan. 10, 2024

The total number of IgA molecules in these bodily secretions is greater than the number of IgG molecules in the blood serum.

From Textbooks ● Jun. 9, 2022

There are five different classes of antibody found in humans: IgM, IgD, IgG, IgA, and IgE.

From Textbooks ● Jun. 19, 2013

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023