B- and T-Lymphocyte Attenuator

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** B- and T-lymphocyte attenuator (289 aa, ~33 kDa) is encoded by the human BTLA gene. This protein is involved in the regulation of immune responses.

**Synonyms:** - B- and T-Lymphocyte-Associated Protein - BTLA - CD272 - CD272 Antigen