Keyhole Limpet Hemocyanin

**Semantic type:** Amino Acid, Peptide, or Protein|Immunologic Factor|Pharmacologic Substance

**Definition:** A natural protein isolated from the marine mollusc keyhole limpet. Keyhole limpet hemocyanin is an immunogenic carrier protein that, in vivo, increases antigenic immune responses to haptens and other weak antigens such as idiotype proteins. (NCI04)

**Synonyms:** - KEYHOLE LIMPET HEMOCYANIN - KLH - KLH - keyhole limpet hemocyanin