Chx10-Cre;Lhx2lox/lox;pMes-Fgf10 animals expressed the mature lens fiber marker Aquaporin-0. Developmental time-course of immunohistochemistry for Prox1 (green) and Aquaporin-0 (red) expression in lenses at E11.5 (A-D), E12.5 (E-H), E13.5 (I-L), E15.5 (M-P), E18.5 (Q-T) and P0.5 (U-X) of Chx10-Cre;Lhx2lox/+ (A,E,I,M,Q,U), Chx10-Cre;Lhx2lox/+;pMes-Fgf10 (B,F,J,N,R,V), Chx10-Cre;Lhx2lox/lox (C,G,K,O,S,W) and Chx10-Cre;Lhx2lox/lox;pMes-Fgf10 (D,H,L,P,T,X) animals. Nuclei are counterstained with DAPI (blue). Scale bars: in N, 100 µm for M,N; in L, 100 µm for A-L; in P, 100 µm for O,P; in X, 100 µm for Q-X.