Pertussis toxin;PERTUSSIS TOXIN FROM BORDETELLA PERTUSSIS MAY BE CELL CULTURE USE WITHOUT PRETREATMENT;Pertussis toxin from Bordetella pertussis;Pertussis Toxin, Bordetella pertussis;(2S,3S)-2-amino-3-methyl-N-(4-nitrophenyl)pentanamide;H-ILE-PNA;L-Isoleucine 4-nitroanilide;L-Isoleucine p-nitroanilide;7184AH