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The 3′-UTR variants of PGR. A, expression of long and short 3′-UTR variants revealed by tag sequencing. B, real-time RT-PCR quantification of PGR 3′-UTR variants. Primers were designed in the region shared by short and long 3′-UTR variants, as well as the region specific to the long 3′-UTR variant alone. *, p < 0.05. C, confirmation of PGR mRNA in the endometrium of rhesus monkey by Northern blot hybridization. The 28 S rRNA was used as RNA loading control.
