Table 1. Assessment of protein expression of ACE2, TMPRSS2 and NRP1 in clear cell, papillary and chromophobe renal cell carcinoma.

PROTEIN	CCRCC (N = 263)	TMA PRCC (n = 139)	CHRCC (N = 18)
ACE2	76% (201/263)	93% (125/134)	0% (0/18)
TMPRSS2	81% (207/255)	56% (74/131)	50% (9/18)
NRP1	85% (220/258)	66% (91/137)	0% (0/18)

TMA, tissue microarray; CCRCC, clear cell renal cell carcinoma; PRCC, papillary renal cell carcinoma; CHRCC, chromophobe renal cell carcinoma. Due to random drop out of TMA-cores the number of assessed cores may vary slightly.