SLC35A1 and infection: Infection of 3P SASRS2 Cas9-P2A-dTomato-T20 VLPs into these “293T-hACE2-SLC35A1 sgRNA” cells resulted in >70% gene editing when using 1.885 μg/μl N protein equivalent VLPs, while this further increased to ∼85% upon doubling VLP volume (Fig. 6F).