[A substance that is being studied as an anticancer drug. It belongs to the family of drugs called recombinant chimeric proteins. Also called NBI-3001. ( NCI )] (UMLS (NCI) C1313726) IL-4 PE38KDEL Immunotoxin; Interleukin-4 Fusion Toxin; interleukin-4 PE38KDEL cytotoxin; interleukin-4 pe38kdel immunotoxin; Interleukin-4 Pseudomonas Exotoxin; =Amino Acid, Peptide, or Protein; Pharmacologic Substance; Immunologic Factor