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Follistatin 315

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  Post Date: Sep 21,2016
  Expiry Date: Sep 21,2017
  Detailed Description: Cas No. :00-00-0 Quantity: 1Kilograms
Specs:alisa@pharm-china.com
Price:1 USD Kilograms
Payment Method: Western Union, MoneyGram, Bank transfer, Bite
Follistatin 315

1. Quick Details:
Follistatin (FST) is a secreted glycoprotein that was first identified as a follicle-stimulating hormone inhibiting substance in ovarian follicular fluid (1, 2). Human Follistatin cDNA encodes a 344 amino acid (aa) protein with a 29 aa signal sequence, an N-terminal atypical TGF binding domain, three Follistatin domains that contain EGF-like and kazal-like motifs, and a highly acidic C-terminal tail. Follistatin is a secreted protein that binds to ligands of the TGF-Beta family and regulates their activity by inhibiting their access to signaling receptors. It was originally discovered as activin antagonists whose activity suppresses expression and secretion of the pituitary hormone FSH (follicle stimulating hormone). In addition to being a natural antagonist, follistatin can inhibit the activity of other TGF-Beta ligands including BMP-2,-4,-6,-7, Myostatin, GDF-11, and TGF-Beta1. Follistatin is expressed in the pituitary, ovaries, decidual cells of the endometrium, and in some other tissues. Recombinant human Follistatin 315 is a 34.7 kDa protein containing amino acids 30-344 of the FST-344 protein.

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a. Fast Delivery: 3 work days after received payment.
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4. More Information About Follistatin 315:

Follistatin (FST) is a secreted glycoprotein that was first identified as a follicle-stimulating hormone inhibiting substance in ovarian follicular fluid (1, 2). Human Follistatin cDNA encodes a 344 amino acid (aa) protein with a 29 aa signal sequence, an N-terminal atypical TGF binding domain, three Follistatin domains that contain EGF-like and kazal-like motifs, and a highly acidic C-terminal tail. Follistatin is a secreted protein that binds to ligands of the TGF-Beta family and regulates their activity by inhibiting their access to signaling receptors. It was originally discovered as activin antagonists whose activity suppresses expression and secretion of the pituitary hormone FSH (follicle stimulating hormone). In addition to being a natural antagonist, follistatin can inhibit the activity of other TGF-Beta ligands including BMP-2,-4,-6,-7, Myostatin, GDF-11, and TGF-Beta1. Follistatin is expressed in the pituitary, ovaries, decidual cells of the endometrium, and in some other tissues. Recombinant human Follistatin 315 is a 34.7 kDa protein containing amino acids 30-344 of the FST-344 protein.

Follistatin is a glycosylated monomeric protein originally isolated from ovarian follicular fluid based on its ability to specifically inhibit pituitary FSH release. To further explore the physiological role of follistatin, we have expressed recombinant human follistatins with 315 (rhFS-315) and 288 (rhFS-288) amino acids in Chinese hamster ovary cells under the control of the simian virus-40 promoter. The two types of FS originated from alternatively spliced mRNAs and rhFS-315 differed from rhFS-288 by having an extra 27-amino acid sequence at the carboxyl-terminal. The yield of the purified rhFS-315 and rhFS-288 after a single step of affinity chromatography on an activin-coupled Affi-Gel column was 3-5 mg/liter conditioned medium. Using the rhFS-315 and rhFS-288 as molecular mass markers, Western blotting with FS carboxyl-terminal-specific antibodies demonstrated that the majority of native FS isolated from porcine ovarian follicular fluid was neither FS-315 nor FS-288, but was composed of 300 amino acids in various forms of glycosylation. This finding is consistent with our earlier results obtained from tryptic peptide fragment analysis of native FS. Only a very small percentage (less than 1%) of native porcine FS was FS-288. In cultures of rat anterior pituitary cells, rhFS-315 (ED50, 115.2 +/- 16.2 pM) is equipotent to native porcine FS (ED50, 86.7 +/- 14.1 pM) on the suppression of FSH release, but, surprisingly, rhFS-288 (ED50, 9.6 +/- 2.2 pM) is 8-10 times more potent than the native protein, similar to the potency of inhibin-A (ED50, 8.6 +/- 0.9 pM). Interestingly, when the in vivo FSH-suppressing activity of rhFS-288 was compared to that of inhibin-A in 1-week ovariectomized adult rats, it was found that rhFS-288 was more potent and longer acting than inhibin-A. Hence, these results indicate that FS-288 is probably one of the most potent natural FSH suppressors.

Follistatin 344 is a naturally occurring human peptide and a potent inhibitor of myostatin. Myostatin encourages the degradation of myotubes (skeletal muscle fibers) therefore inhibition of myostatin will ultimately result in increased muscle mass by preventing degradation.Follistatin is being studied for its role in regulation of muscle growth, as an antagonist to myostatin (also known as GDF-8, a TGF superfamily member). Lee & McPherron demonstrated that inhibition of GDF-8, either by genetic elimination (knockout) or by increasing the amount of follistatin, resulted in greatly increased muscle mass.In 2009, research with macaque monkeys demonstrated that regulating follistatin via gene therapy also resulted in muscle growth and increases in strength.A study has also shown that increased levels of follistatin, by leading to increased muscle mass of certain core muscular groups, can increase life expectancy in cases of spinal muscular atrophy (SMA) in animal models.It is also being investigated for its involvement in polycystic ovary syndrome (PCOS), though there is debate as to its direct role in this infertility disease.

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6. Seller's Information:

Company: Shanghai Yijing Pharmaceutical Co., Ltd
Mob: +OO86-13O26163653

7. How to place an order:

Send me an email at the address above, tell me product name and quantity.

  CAS Registry Number:

00-00-0

  Company: Shanghai Yijing Pharmaceutical Co., Ltd     [ China ]        
  Contact: Alisa
  Tel: +86-130-26163653
  Fax:
  Email: alisa@pharm-china.com
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