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. 2015 Aug 25;10(8):e0136566. doi: 10.1371/journal.pone.0136566

Fig 4. The CDK inhibitor p21/Cip1 is up-regulated in Ndr1/2-double null embryos and required for survival.

Fig 4

(A) Changes in transcript levels between wild-type and Ndr1/2-double null embryos at E8.5 as revealed by microarray analysis (see S1 and S2 Tables). (B) Validation of the alterations in p21 and p27 expression in wild-type (control) and Ndr1/2-double null embryos by qRT-PCR (at E8.5). Data shown represent the average gene expression levels obtained by analyzing three independent embryos per genotype. Each embryo was analyzed in triplicate. Statistical analysis was performed using a two-tailed Student t-test assuming unequal variance. (C) Genotype distribution of offspring from Ndr1 +/-;Ndr2 -/-;p21 +/- intercrosses. Embryos were isolated at E8.5 and genotyped. Top panel: p21 genotype of the Ndr1/2-double null embryos; bottom panel: Ndr1 genotype of the p21-null embryos. The p-values are indicative of the probabilities to obtain the observed genotype distribution by chance.