https://www.nist.gov/publications/purified-bacillus-anthracis-lethal-toxin-complex-formed-vitro-and-during-infection
Anthrax protective antigen (PA, 83 kDa), a pore-forming protein upon protease activation to 63 kDa (PA63), translocates lethal factor (LF) and edema factor (EF)
bacillus anthracislethal toxinpurifiedcomplexvitro