BoNT/E4 (F145)
UniprotKB: Q8KZM3, NCBI: 21832314
Strains: 5521, BL-5262-9RE, BoNT E BL5262, BL 5262, CDC51208, ATCC 43755, CDC_51208
BoNT/E4 (D149)
UniprotKB: Q9FAR6, NCBI: BAB12249
Strains: BL 6340/ATCC 43755/BL 5520/KZ 147
BoNT/E4 (AF69)
UniprotKB: P30995, NCBI: CAA43998.1
Strains: ATCC43755 and ATCC43181