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CYT-406

重組牛β細(xì)胞素（rbBTC）

2μg/10μg/1mg

Prospec

Background:
	BetaCellulin is a Type I membrane protein in precursor form but an extracellular protein in mature form. It is Expressed in a wide range of tissues, including the mammary gland. BetaCellulin is a Potent mitogen for retinal pigment epithelial cells and vascular smooth muscle cells. The effects of betacellulin are probably mediated by the EGF receptor and other related receptors.
	Description :
	Recombinant Bovine Betacellulin produced in E.Coli is a single, non-glycosylated, polypeptide chain containing 80 amino acids and having a molecular mass of 9003 Dalton. Recombinant Bovine BTC is purified by proprietary chromatographic techniques.
	Physical Appearance:
	Sterile Filtered White lyophilized （freeze-dried） powder.
	Formulation:
	The protein was lyophilized after extensive dialysis against 50mM acetic acid.
	Solubility:
	It is recommended to reconstitute the lyophilized Bovine BTC in sterile 18MΩ-cm H₂O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.
	Stability:
	lyophilized Bovine BTC although stable at room temperature for 3 weeks, should be stored desiccated below -18⁰C. Upon reconstitution Bovine BTC should be stored at 4⁰C between 2-7 days and for future use below -18⁰C. For long term storage it is recommended to add a carrier protein （0.1% HSA or BSA）. Please avoid freeze-thaw cycles.
	Purity:
	Greater than 95.0% as determined by: （a） Analysis by RP-HPLC. （b） Anion-exchange FPLC. （c） Analysis by reducing and non-reducing SDS-PAGE Silver Stained gel.
	Amino acid sequence:
	The sequence of the first five N-terminal amino acids was determined and was found to be Asp-Gly-Asn-Ser-Thr.
	Dimers and aggregates:
	Less than 1% as determined by silver-stained SDS-PAGE gel analysis.
	Biological Activity:
	ProSpec’s rbBTC is fully biologically active when compared to standards. The ED50, calculated by the dose-dependant proliferation of murine BALBC 3T3 cells （measured by 3H-thymidine uptake） is < 10.0 ng/ml.
	Endotoxin:
	Less than 0.1 ng/µg （IEU/µg） of Bovine Betacellulin.
	Protein content:
	Protein quantitation was carried out by two independent methods: 1. UV spectroscopy at 280 nm using the absorbency value of 0.59 as the extinction coefficient for a 0.1% （1mg/ml） solution. This value is calculated by the PC GENE computer analysis program of protein sequences （InliGenetics）. 2. Analysis by RP-HPLC, using a calibrated solution of BTC as a Reference Standard.
	Usage:
	Prospec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.

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