ACTN3, NT (Alpha-actinin-3, Alpha-actinin Skeletal Muscle Isoform 3, F-actin Cross-linking Protein)

The alpha-actinins are a multigene family of four actin-binding proteins related to dystrophin. The two skeletal muscle isoforms of alpha-actinin (ACTN2 and ACTN3) are major structural components of the Z-line involved in anchoring the actin-containing thin filaments. In humans, ACTN2 is expressed in all muscle fibres, while ACTN3 expression is restricted to a subset of type 2 fibers. Absence of alpha-actinin-3 is not associated with an obvious disease phenotype, raising the possibility that ACTN3 is functionally redundant in humans, and that alpha-actinin-2 is able to compensate for alpha-actinin-3 deficiency. Alpha-Actinin-3 is specifically expressed in fast-twitch myofibers responsible for generating force at high velocity. The absence of a disease phenotype secondary to alpha-actinin-3 deficiency is likely due to compensation by the homologous protein, alpha-actinin-2. However, the high degree of evolutionary conservation of ACTN3 suggests function(s) independent of ACTN2. Highly significant associations between ACTN3 genotype and athletic performance have been demonstrated in both male and female athletes.\n\nApplications:\nSuitable for use in Flow Cytometry, Western Blot, Immunohistochemistry and Immunocytochemistry. Other applications not tested.\n\nRecommended Dilution:\nWestern Blot: 1:10,000 \nImmunocytochemistry: 1:100-1:250\nImmunohistochemistry (paraffin): 1:100-1:250\nFlow Cytometry: 1:200\nOptimal dilutions to be determined by the researcher.\n\nPositive Control:\nHuman skeletal muscle tissue lysate\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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