CMP, or Matrilin 1, cartilage matrix protein, is a human gene encoded by MATN1. It may also be known as: Cartilage matrix protein; Matrilin-1; CRTM. The encoded protein has an amino acid length of 496 and a mass of 53.7 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.