The C5a receptor also known as complement component 5a receptor 1 (C5AR1) or CD88 (Cluster of Differentiation 88) is a G protein-coupled receptor  for C5a.
The C5a receptor, also known as complement component 5a receptor 1 (C5AR1) or CD88 (Cluster of Differentiation 88), is a type of G protein-coupled receptor that binds to and responds to the chemical signal C5a.