| IRG | immunoreactive gastrin; immunoreactive glucagon |
|---|---|
| IRGl | immunoreactive glucagon |
| IRP | immunoreactive plasma; immunoreactive proinsulin; incus replacement prosthesis; insulin-releasing po... |
| GnRH | Gonadotropin Releasing Hormone [HP 1898, 2034] = LHRH = Go... |
| GCG | glucagon |