MEIS1 is a symbol for the gene, Meis homeobox 1, in humans. Other names include: Homeobox protein Meis1. The encoded protein has an amino acid length of 390 and a mass of 43.0 kDa. Other isoforms may exist. MEIS1 is a member of the TALE/MEIS homeobox family. This gene shares homology with other species, including: Mouse, Fly, Rat, Zebrafish, Frog, Chicken.