Prolactin regulatory element-binding protein (PREB), partial, human, recombinant

Organism: Homo sapiens (Human). Source: E.coli. Expression Region: 1-388aa. Protein Length: Partial. Tag Info: N-terminal 10xHis-tagged and C-terminal Myc-tagged. Target Protein Sequence: MGRRRAPELY RAPFPLYALQ VDPSTGLLIA AGGGGAAKTG IKNGVHFLQL ELINGRLSAS LLHSHDTETR ATMNLALAGD ILAAGQDAHC QLLRFQAHQQ QGNKAEKAGS KEQGPRQRKG AAPAEKKCGA ETQHEGLELR VENLQAVQTD FSSDPLQKVV CFNHDNTLLA TGGTDGYVRV WKVPSLEKVL EFKAHEGEIE DLALGPDGKL VTVGRDLKAS VWQKDQLVTQ LHWQENGPTF SSTPYRYQAC RFGQVPDQPA GLRLFTVQIP HKRLRQPPPC YLTAWDGSNF LPLRTKSCGH EVVSCLDVSE SGTFLGLGTV TGSVAIYIAF SLQCLYYVRE AHGIVVTDVA FLPEKGRGPE LLGSHETALF SVAVDSRCQL HLLPSRRS. Purity: Greater than 85% as determined by SDS-PAGE. Endotoxin: Not test. Biological Activity: n/a. Form: Liquid or Lyophilized powder. Buffer: If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0. Reconstitution: We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20 °C/-80 °C. Our default final concentration of glycerol is 50%. Customers could use it as reference. Storage: The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20 °C/-80 °C. The shelf life of lyophilized form is 12 months at -20 °C/-80 °C. Notes: Repeated freezing and thawing is not recommended. Store working aliquots at 4 °C for up to one week. Relevance: Guanine nucleotide exchange factor that specifically activates the small GTPase SAR1B. Mediates the recruitment of SAR1B and other COPII coat components to endoplasmic reticulum membranes and is therefore required for the formation of COPII transport vesicles from the ER. Was first identified based on its probable role in the regulation of pituitary gene transcription. Binds to the prolactin gene (PRL) promoter and seems to activate transcription. Reference: "Cloning and characterization of human PREB, a gene that maps to a genomic region associated with trisomy 2p syndrome." Taylor Clelland C.L., Levy B., McKie J.M., Duncan A.M.V., Hirschhorn K., Bancroft C. Mamm. Genome 11:675-681(2000). Function: nan