The product is an IL-3 conjugated truncated diphtheria toxin. It is composed by the catalytic and translocation domains of diphtheria toxin fused via Met-His linker to a full-length human IL-3. C2553 H4026 N692 O798 S16 https://www.creativebiomart.net/therapeutic-proteins/p/196/fusion-proteins-of-diphtheria-toxin-and-human-il-3/