A protein found in milk that is used to make cheese, paint, and glue.
From Latin 'caseus' (cheese), as casein is the main protein that makes cheese solid. The term was formalized in the 1800s when chemists isolated and named this milk protein.
Casein is the secret ingredient that makes cheese stretchy and melty—it's the same protein used in ancient glues and is now being researched for eco-friendly plastics as a sustainable alternative to petroleum-based polymers.
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