in view of the fact that in the amphibian lens , epithelial cells which retain proliferative activity accumulate alpha and beta crystallins but not gamma crystallins , while fiber cells which are devoid of proliferative activity accumulate all three classes of crystallins , the present results suggest that the tvi cell line has lost the capacity to maintain lens fiber cells , which are known to be present in primary culture of iris epithelial cells .
C0005203
beta crystallins
C0010422
crystallins