Fig. 2: hACE2 and hTMPRSS2 expression in the double-transgenic (double-Tg) mice.

a Experimental graphic for generating the double-Tg mice. Expression levels of hACE2 (b) and hTMPRSS2 (c) mRNA in the lungs, brain, heart, liver, kidney, and colon of the double-Tg or wild-type C57BL/6 mice (non-Tg) were assessed via RT-qPCR. Symbols represent the means ± SEM.