PDIA5 (Protein Disulfide Isomerase Family A, Member 5): PDIA5 is involved in the folding and maturation of proteins within the endoplasmic reticulum, playing a vital role in ensuring correct protein conformation and function. It aids in the formation and rearrangement of disulfide bonds, which are crucial for protein stability. Dysregulation of PDIA5 can lead to protein misfolding disorders and has been linked to the development of diabetes and neurodegenerative diseases, underscoring its importance in protein quality control.