Figure 6. SDS PAGE of eastern gray kangaroo lens insoluble proteins in 7 concentric layers from a 1.6-year-old lens and 6 layers from a 4-year-old lens. Layers are numbered in order of their removal from the lens so that layer 1 is the outermost from each lens and layer 6 (4-year old) or 7 (1.6-year old) is the innermost. Standard protein sizes (kDa) are indicated on the right.