线性范围:62.5 - 4000 pg/ml.MHC class I polypeptide-related sequence B (MICB) is a protein that is encoded by the MICB gene located within MHC locus.MICB is related to MHC class I and has similar domain structure, which is made up of external α1α2α3 domain, transmembrane segment and C-terminal cytoplasmic tail.MICB is a stress-induced ligand for NKG2D receptor.The heat shock stress pathway is involved in the regulation of MICB expression as transcription of MICB is regulated by promoter heat shock element.