Figure 2. Real-time PCR analysis for transcripts of αA-crystallin and βB1-crystallin during the lens development. Stages are according to the normal table of Nieuwkoop & Faber. The red curve illustrates the relative expression of transcripts of αA-crystallin. From the beginning of expression at stage 26 to stage 38, it displayed an increasing trend. After stage 38, the expression began to decrease. Finally, the expression quantity maintained at a relative stable level. The same went for βB1-crystallin, which is shown by the black curve.