{"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Melanoma KBA.62 antibody was generated against human KAL cells derived from lymph node metastasis of malignant melanoma and reacts against an antigen present in melanocytic tumors. It reacted positively against most benign and malignant melanocytic proliferations and negatively against most human non-melanocytic neoplasms. Moreover, this antibody reacts positively against junctional nevus cells but not intradermal nevi, and against fetal melanocytes but not normal adult melanocytes."}]}]}