An antibody or immune protein that clumps together cells or particles from different species.
From hetero- (other, different) plus agglutinin (a substance that causes clumping). Formed from the prefix hetero-, Latin glutinare (to glue), and the -in suffix for proteins.
Heteroaggluninins are why your immune system can react to pathogens from totally different species—they're cross-species immune recognition proteins that show how connected all life is at the molecular level!
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