In biology, a crystallin's a water-soluble structural protein found in the lens of the eye, accounting for the transparency of the structure and also in cornea, when it can play a similar role. It's also been identified in other places such as the heart and aggressive breast cancer tumors . Since it's been shown that lens injury may promote nerve regeneration, crystallin has been an area of neural research. So far, it's been demonstrated that crystallin β b2 (crybb2) may be a neurite promot… (More on Crystallin)