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  • GDF-8

    CATÉGORIE ET ​​ÉTIQUETTES:
    Peptides
    Attestation: certificat d'authenticité,ISO9001,KEOSHER
    Numéro de modèle: 901758-09-6
    Quantité minimum d'achat: 1box
    Heure de livraison: Whitin 2 jours
    Modalités de paiement: T/T, Western union, MoneyGram
    demande
    • Caractéristiques

    GDF-8 Muscle Building Peptides Myostatin 1 mg/vial CAS 901758-09-6 For Muscle Mass

    Abstract

    1. Myostatin (also known as growth differentiation factor 8, abbreviated GDF-8) is a myokine, a protein produced and released by myocytes that acts on muscle cellsautocrine function to inhibit myogenesis: muscle cell growth and differentiation. In humans it is encoded by the MSTN gene. Myostatin is a secreted growth differentiation factor that is a member of the TGF beta protein family.

    2. Animals either lacking myostatin or treated with substances that block the activity of myostatin have significantly more muscle mass. Furthermore, individuals who have mutations in both copies of the myostatin gene have significantly more muscle mass and are stronger than normal. There is hope that studies into myostatin may have therapeutic application in treating muscle wasting diseases such as muscular dystrophy.

    Application

    1) The gene encoding myostatin was discovered in 1997 by geneticists Se-Jin Lee and Alexandra McPherron who produced a strain of mutant mice that lack the gene. These myostatinknockoutmice have approximately twice as much muscle as normal mice. These mice were subsequently namedmighty mice”.

    2) Naturally occurring deficiencies of myostatin have been identified in cattle by Ravi Kambadur, whippets, and humans; in each case the result is a dramatic increase in muscle mass. A mutation in the 3UTR of the myostatin gene in Texel sheep creates target sites for the microRNAs miR-1 and miR-206. This is likely to cause the muscular phenotype of this breed of sheep.

    3) Human myostatin consists of two identical subunits, each consisting of 109 (NCBI database claims human myostatin is 375 residues long) amino acid residues. Its total molecular weight is 25.0 kDa. The protein is inactive until a protease cleaves the NH2-terminal, ou “pro-domainportion of the molecule, resulting in the active COOH-terminal dimer. Myostatin binds to the activin type II receptor, resulting in a recruitment of either coreceptor Alk-3 or Alk-4. This coreceptor then initiates a cell signaling cascade in the muscle, which includes the activation of transcription factors in the SMAD familySMAD2 and SMAD3. These factors then induce myostatin-specific gene regulation. When applied to myoblasts, myostatin inhibits their differentiation into mature muscle fibers.

    Myostatin also inhibits Akt, a kinase that is sufficient to cause muscle hypertrophy, in part through the activation of protein synthesis. Cependant, Akt is not responsible for all of the observed muscle hyperthrophic effects which are mediated by myostatin inhibition[8] Thus myostatin acts in two ways: by inhibiting muscle differentiation, and by inhibiting Akt-induced protein synthesis.

    certificat d'authenticité

    Item spécification Result
    Apparence poudre blanche Conforme
    Identification Positif Conforme
    Essai 99.0% min 99. 3%
    Perte au séchage 6.0%max. 4.80%
    Mass Balance 95.0~105.0% Conforme
    Acetate Content (HPIC) 12.0%max. 10.80%
    Peptide Content (N%) 80.0%min. 88.00%
    Amino Acid Composition ±10% of theoretical Conforme
    Single Impurity (HPLC) 1.0%max. 0.85%

    Structure and mechanism of action

    Human myostatin consists of two identical subunits, each consisting of 109 (NCBI database claims human myostatin is 375 residues long) amino acid residues. Its total molecular weight is 25.0 kDa. The protein is inactive until a protease cleaves the NH2-terminal, ou “pro-domainportion of the molecule, resulting in the active COOH-terminal dimer. Myostatin binds to the activin type II receptor, resulting in a recruitment of either coreceptor Alk-3 or Alk-4. This coreceptor then initiates a cell signaling cascade in the muscle, which includes the activation of transcription factors in the SMAD familySMAD2 and SMAD3. {{|}}These factors then induce myostatin-specific gene regulation. When applied to myoblasts, myostatin inhibits their differentiation into mature muscle fibers.

    Myostatin also inhibits Akt, a kinase that is sufficient to cause muscle hypertrophy, in part through the activation of protein synthesis. Cependant, Akt is not responsible for all of the observed muscle hyperthrophic effects which are mediated by myostatin inhibition. Thus myostatin acts in two ways: by inhibiting muscle differentiation, and by inhibiting Akt-induced protein synthesis.

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