SEC31B (SEC31 Homolog B, COPII Coat Complex Component): SEC31B is a component of the COPII complex, which is involved in protein transport from the endoplasmic reticulum (ER) to the Golgi apparatus. It plays a crucial role in the secretion of proteins and the maintenance of cellular organelle integrity. Mutations in SEC31B can disrupt protein transport and lead to ER stress-related disorders....