Sonic hedgehog is one of three proteins in the mammalian signaling pathway family called hedgehog, the others being desert hedgehog (DHH) and Indian hedgehog (IHH).
Sonic hedgehog er et af de tre proteiner i pattedyrs signaleringsvej's familien kaldet hedgehog, de andre er Desert hedgehog (DHH) og Indian hedgehog (IHH).