BL22(redirected from anti-CD22 immunotoxin)
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BL22A 63-kDa anti-CD22 recombinant immunotoxin, containing truncated Pseudomonas exotoxin and variable domains from an anti-CD22 antibody. It was effective against hairy cell leukaemia in phase-II trials of patients who had relapse less than 4 years after cladribine therapy.
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