With carrier: A 0.22 μm filtered solution of 0.25 mg/ml hLatent TGF-β1 in PBS, pH 7.2 and 25% (v/v) glycerol containing 20 μg BSA per 1 μg hLatent TGF-β1. Carrier free: A 0.22 μm filtered solution of 0.25 mg/ml hLatent TGF-β1 in PBS, pH 7.2 and 25% (v/v) glycerol.
Stable at -20°C for 1 year after receipt. Maintain sterility. Storage at -20°C should be in a manual defrost freezer.
|MW (kDa)||13 and 40|
|Purity||>98% as determined by SDS-PAGE of 6 μg reduced (+) and non-reduced (-) recombinant hLatent TGF-β1. All lots are greater than 98% pure.|
|Endotoxin||Less than 0.01 ng endotoxin/1 μg hLatent TGF-β1.|
|Activity||The bioactivity of recombinant hLatent TGF-β1 was determined by assessing inhibition of IL-4 induced HT-2 cell proliferation. The ED50 of each lot is between 0.2- 10 ng/ml after acid activation.|
|Molecular Formula||Recombinant hLatent TGF-β1 contains no "tags" and the nonglycosylated small latent TGF-β1 complex has a calculated MW of 41,251. DTT-reduced protein migrates as 40 and 13 kDa polypeptides, and the non-reduced cystine-linked homodimers migrate as 80 and 25 kDa proteins. The expected amino-terminal ALDTN of recombinant hTGF-β1 and the expected amino-terminal LSTSK of recombinant latency-associated peptide (LAP) were verified by amino acid sequencing.|
Recombinant human latent TGF-β1 (hLatent TGF-β1) Leu30-Ser390 (Accession #P01137) was expressed in human 293 cells at Cell Signaling Technology.
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