MEF2C-Het (mouse model nomenclature)

**What it means:** "Het" is shorthand for "heterozygous." So Mef2c-Het means mice that have one normal copy of the mouse version of the MEF2C gene (Mef2c, lowercase in mice) and one broken copy. This mirrors the human heterozygous condition exactly. **Why mouse naming conventions matter:** In genetics, human genes are written in ALL CAPS (MEF2C) and mouse genes are written in title case (Mef2c). This is a convention that helps researchers quickly tell which species they're reading about.