Figure 1. The circadian rhythm and mRNA level of core circadian clock genes. (A) The circadian rhythm of core circadian genes, including CLOCK(A), ARNTL(B), CRY1(C), CRY2(D), NR1D1(E), PER2(F) and PER3(G). (B) Box plots derived from TCGA STAD dataset comparing the expression of CLOCK, ARNTL, CRY1, CRY2, NR1D1, PER1, PER2, PER3 and RORA in STAD tissue and normal tissues.