In 111 Monoclonal Antibody B3

**Semantic type:** Amino Acid, Peptide, or Protein|Indicator, Reagent, or Diagnostic Aid|Pharmacologic Substance

**Definition:** A radioimmunoconjugate of monoclonal antibody (MoAb) B3 labeled with Indium 111 (In-111). MoAb B3 is a murine MoAb that recognizes a Lewis Y carbohydrate antigen present on the surface of many carcinomas. This radioimmunoconjugate emits gamma radiation and X-Ray photons that can be captured by gamma camera, allowing imaging of Lewis Y expressing tissues.

**Synonyms:** - 111 In-B3 - Indium In 111 Monoclonal Antibody B3