Comparison of gene expression between <i>Lhx2-Cre:Lhx2^flox/flox</i> and <i>Lhx2^−/−</i> embryos in the optic vesicle and lens placode.

aExpression is detected. bExpression is not detected. cExpression is transiently detected.已检测到a型表达（aExpression）。 未检测到b型表达（bExpression）。 c型表达（cExpression）被瞬时检测到。