text:  Whole lung of Rbpjk -/- mouse at embryonic day 18.5, replicate 1 Whole lung of RbpjkCNULL (Shhcre/+; RbpjkFlox/Flox) mouse at embryonic day 18.5 strain: C57BL/6; developmental stage: E18.5; genotype: Rbpjk -/-