A protein found in muscle cells that plays a crucial role in forming and maintaining neuromuscular junctions, the connections between nerves and muscles.
From Greek 'agrios' (wild, fierce) or possibly from a contraction of 'aggregate' or similar terms, combined with the '-in' suffix used for proteins. The term was coined by neuroscientists in the late 20th century as they identified this specific protein's function.
Agrin is like the glue that holds together one of nature's most precise communication systems—without it, your nerves couldn't talk to your muscles, and you couldn't move at all; mutations in agrin genes cause certain forms of muscular dystrophy.
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