Doublewin Biological Technology Co., Ltd.(expird)
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Business Type:Lab/Research institutions
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China (Mainland)
Business Type:Lab/Research institutions
CAS NO.946870-92-4
1. We have experience in exporting steroids, as you know, EU places much emphasis on them, and you must find a experienced partner who will assure you;
2. Quality: Our company is a professional leading factory in China in pharmaceutical area, We had stable customers and exported to Germany, Spain, UK, USA, Australia, Middle East, and any other countries. We can provide good references about our company. As for the quality of the products, we 're sure they can satisfy you well enough;
3. Package: Professional packing with professional materials
4. Delivery: We have products in stock, and we will deliver them soon when your PO arrived.
Meanwhile we will give you the tracking number in order to make you know the exact location of the products. We will keep track of the product until they arrive you; We choose the best courier service for you, and with the delivery around 4-7 working days.
5. Service: Best Service with after-sales service and consultation.
WHAT IS IGF-1 LR3
IGF-1 LR3, also known as Long Arg3 IGF-1, is a recombinant protein analogue of human Insulin-Like Growth Factor-1 that has a molar mass of 9,200 Daltons and is comprised of 83 amino acids. IGF-1 LR3 comprises the complete IGF-1 sequence, but with a 13 amino acid extension on the B-Terminus domain and the substitution of an Arginine for the Glutamic Acid at position 3. The LR3 analogue of IGF-1 was created with the intent to drastically increase the biological activity of the protein and IGF-LR3 is several times more potent than rhIGF-1. This specific sequence alteration has decreased the affinity of binding to the IGFBPs, which control the biological actions of IGF-1 and prevent the protein from reaching the IGF-1 receptors.
IGF-1 LR3 is an 83 amino acid analogue of human IGF-1 that has been modified to include a 13 amino acid extension on its N-Terminus and the substitution of an Arginine amino acid for Glutamine at position 3. While IGF-1 LR3 is comprised of the the complete human IGF-1 sequence, these modifications have rendered the LR3 version to be much more potent than IGF-1 in-vitro and in-vivo. The result of these modifications is that IGF-1 LR3 does not bind as strongly to the IGFBPs, which modify the biological actions of IGF-1. Resultantly, IGF-1 LR3 binds to the type 1 IGF-1 receptor with similar affinity to that of wild type IGF-1, but with higher biological activity and has several advantages over recombinant insulin. The supplementation of mammalian cell cultures with Long R3 IGF-1 at a much lower concentration results in more highly elevated productivity than with standard concentrations of insulin and/or standard IGF-1. IGF-1 LR3 is better able to stimulate the type 1 IGF receptor and thus induce a higher level of activation of intracellular signaling, which is responsible for promoting cell proliferation and the inhibition of apoptosis.
Long arginine 3-IGF-1, abbreviated as IGF-1 LR3 or LR3-IGF-1, is a synthetic protein and lengthened analogue of human insulin-like growth factor 1 (IGF-1).It differs from native IGF-1 in that it possesses an arginine instead of a glutamic acid at the third position in its amino acid sequence ("arginine 3"), and also has an additional 13 amino acids at its N-terminus (MFPAMPLLSLFVN) ("long"), for a total of 83 amino acids (relative to the 70 of IGF-1). The consequences of these modifications are that IGF-1 LR3 retains the pharmacological activity of IGF-1 as an agonist of the IGF-1 receptor, has very low affinity for the insulin-like growth factor-binding proteins (IGFBPs), and has improved metabolic stability.As a result, it is approximately three times more potent than IGF-1,and possesses a significantly longer half-life of about 20-30 hours (relative to IGF-1's half-life of about 12-15 hours).
The amino acid sequence of IGF-1 LR3 is MFPAMPLSSL FVNGPRTLCG AELVDALQFV CGDRGFYFNK PTGYGSSSRR APQTGIVDEC CFRSCDLRRL EMYCAPLKPA KSA.