Overlap between essential genes in mESCs and genes essential in vivo in mouse or human. (A) Overlap between essential genes in mESCs and embryonic lethal genes in mice (odds ratio = 12.84, P < 10−16) and with genes known to be lethal or cause abnormal growth (odds ratio = 13.94, P < 10−16). (B) Overlap between human LoF mutation-intolerant genes, essential genes in mESCs (odds ratio = 1.88, P < 10−16), and essential genes in hESCs (odds ratio = 2.33, P < 10−16). (C) Expression levels in mESCs for genes intolerant to LoF mutations in human divided into essential and nonessential genes in ESCs. Expression values are signal intensities (log10) from microarray data. (D) Association between the pattern of expression (brain-specific genes vs. globally expressed genes) and being essential in ESCs and/or intolerant to LoF mutations in human. Values are odds ratio ± 95% confidence interval. (E) Association between dominant and recessive inheritance and being essential in ESCs and/or intolerant to LoF mutations in humans. Values are odds ratio ± 95% confidence interval. (***) P < 0.001.