Definitions

1. noun

An antigenically identical protein or glycoprotein from the same species but from a different individual, used in medical research and immunology to study the immune response.

“The researchers used isoantigens to study the rejection of transplanted organs in humans.”

2. noun

A protein or glycoprotein from the same species but with minor genetic differences, used as a marker in immunological and genetic studies.

“Isoantigens were used to identify genetic differences between individuals in a population study.”