Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
A regulatory protein that cycles between inactive GDP-bound and active GTP-bound states to transmit signals from cell surface receptors to intracellular targets.
AP course connection
Topic 4.2: 4.2 Introduction to Signal Transduction