HMX3 Full-Length MS Protein Standard (NP_001099044), Labeled with [U- 13C6, 15N4]-L-Arginine and [U- 13C6, 15N2]-L-Lysine, was produced in human 293 cells (HEK293) with fully chemically defined cell culture medium to obtain incorporation efficiency at Creative-Proteomics. Transcription factor involved in specification of neuronal cell types and which is required for inner ear and hypothalamus development. Binds to the 5-CAAGTG-3 core sequence. Controls semicircular canal formation in the inner ear. Also required for hypothalamic/pituitary axis of the CNS.