CD63 and infection: We further generated cells expressing chimeric CD63 in which the amino acid residues at positions 141 to 150 and 151 to 160 were swapped (chCD63-mLEL141–150, chCD63-mLEL151–160, cmCD63-hLEL141–150, and cmCD63-hLEL151–160) and found that the amino acid residues at positions 141 to 150 of human CD63 were critical for VSVΔG*-LUJV/GP infection (Fig. 4B).