claim: the n sequence in sars-cov-2 enhances spike protein cleavage by tmprss
evidence_1: thus, both the furin score and molecular docking revealed that the insertion sequence of sars-cov-2 facilitates the tmprss2 recognition and s protein cleavage.", "the two potential spike protein cleavage sites of sars-cov and sars- cov-2 by tmprss2.", "we speculated that r682, r683 and r685 (red box) could be used as the most suitable substrates for tmprsss, which can increase the spike protein cleavage efficiency of tmprsss, promote its activation and enhance sars-cov-2 infection.")