CRSP1 is an alias for the gene, Mediator complex subunit 1, in humans. Other names include: Mediator of RNA polymerase II transcription subunit 1; Activator-recruited cofactor 205 kDa component; ARC205; Peroxisome proliferator-activated receptor-binding protein; PPAR-binding protein; Thyroid hormone receptor-associated protein complex 220 kDa component; Trap220; Thyroid receptor-interacting protein 2; TR-interacting protein 2; TRIP-2; Vitamin D receptor-interacting protein complex component DRIP205; p53 regulatory protein RB18A; CRSP200; DRIP205; DRIP230; PPARBP; PPARGBP; RB18A; TRIP2. The encoded protein has an amino acid length of 1581 and a mass of 168.5 kDa. Other isoforms may exist. CRSP1 is a member of the Mediator complex subunit 1 family. This gene shares homology with other species, including: Fly, Mouse, Rat, Zebrafish, Frog, Chicken.