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Localization of ACE2 and TMPRSS2 in Embryos. Maximum intensity projections (MIPs) of confocal z-stacks of blastocysts, showing nuclei (blue) and ACE2 or TMPRSS2 (white). Pink arrowheads point to cell membranes. Scale bars represent 50 µm in low magnification panels, and 10 µm in high magnification panels. Representative images from independent biological replicates (n = 5 embryos for each factor).
