重组大鼠CT-1

名称：重组大鼠CT-1

Accession：Q63086

GeneID：29201

Source：Escherichia coli.

Molecular Weight：Approximately 21.4 kDa, a single non-glycosylated polypeptide chain containing 203 amino acids.

Quantity：2µg/10µg/1000µg

AA Sequence：MSQREGSLED HQTDSSFSFL PHLEAKIRQT HNLARLLTKY ADQLLEEYVQ QQGEPFGLPG FSPPRLPLAG LSGPAPSHAG LPVSERLRQD AAALSALPAL LDAVRRRQAE LNPRAPRLLR SLEDAARQVR ALGAAVETVL AALGAAARGP VPEPVATSAL FTSNSAAGVF SAKVLGLHVC GLYGEWVSRT EGDLGQLVPG GVA

Purity：> 95 % by SDS-PAGE and HPLC analyses.

Biological Activity：Fully biologically active when compared to standard. The ED₅₀ as determined by a cell proliferation assay using human TF-1 cells is less than 0.5 ng/ml, corresponding to a specific activity of > 2.0 × 10⁶ IU/mg.

Physical Appearance：Sterile Filtered White lyophilized (freeze-dried) powder.

Formulation：Lyophilized from a 0.2 μm filtered concentrated solution in 30 % Acetonitrile, 0.1 % TFA.

Endotoxin：Less than 1 EU/μg of rRtCT-1 as determined by LAL method.

Reconstitution：We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in 4mM HCl to a concentration of 0.1-1.0 mg/ml. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.

Stability & Storage：Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Reference：1. Pennica D, Wood WI, Chien KR. 1996. Cytokine Growth Factor Rev. 7:81-91.
2. Robledo O, Fourcin M, Chevalier S, et al. 1997. J Biol Chem. 272:4855-63.
3. Gerhard DS, Wagner L, Feingold EA, et al. 2004. Genome Res. 14:2121-7.

Background：Cardiotrophin1 (CT1) is a member of the cytokine family which also includes IL-6, IL-11, leukemia inhibitory factor (LIF), oncostatin M (OSM), and ciliary neurotrophic factor (CNTF). CT-1 is a pleiotropic cytokine which is expressed in various tissues including the ***** heart, skeletal muscle, ovary, colon, prostate and fetal lung. Studies showed CT-1 which induces cardiac myocyte hypertrophy in vitro can bind to and activate the ILST/gp130 receptor. Rat CT1 encodes a 203 amino acid (a.a.) residue protein that lacks a hydrophobic signal peptide and it shares 94 % a.a. and 79 % a.a. sequence identity with human and murine CT-1.

SDS-PAGE：