There were no standards used in these ELISAs,

thus no standard curve was created. Therefore, the absorbances relative to muscle weight were assessed and compared as percent changes. The overall intra-assay percent coefficients of variation were 7.12%, 6.47%, 8.03%, and 6.57% for Myo-D, myogenin, MRF-4, and myf5, respectively. Myofibrillar protein content Total cellular RNA was extracted from biopsy samples with a monophasic solution of phenol and guanidine isothiocyanate contained within the TRI-reagent (Sigma Chemical Co., St. Louis, MO), and then isolated with 100% isopropanol. The interphase was removed and total (soluble + insoluble) muscle protein was then isolated from the organic phase with 100% isopropanol and learn more washed with a 0.3 M guanidine HCl/95% ethanol solution. Ferrostatin-1 Myofibrillar (soluble) protein was further isolated with repeated incubations in 0.1% SDS at 50°C and separated by centrifugation. Total and myofibrillar protein content were determined spectrophotometrically based on the Bradford method at a wavelength of 595 nm [33]. A standard curve was generated (R = 0.98, p = 0.001) using bovine serum albumin (Bio-Rad, Hercules, CA), and total and myofibrillar protein content was expressed relative to muscle wet-weight [34]. Total DNA content Total DNA was isolated from the remaining interphase from the total

RNA isolation procedure using 100% ethanol, washed with a 0.1 M sodium citrate/10% ethanol solution, and resuspended in 75% ethanol. The DNA was then solubilized in 8 mM NaOH. The total DNA concentration was determined spectrophotometerically (Helio γ, Thermo Electron, Milford, MA) by optical density (OD) at 260 nm using an OD260 equivalent to 50 μg/μl [35]. At a wavelength of 260 nm, the average extinction coefficient for DNA is 0.024 μg/ml; therefore, an OD of 1.0 corresponds

to a DNA concentration of 50 μg/ml. The final DNA concentration was expressed relative to muscle wet-weight. Reported side effects from supplements On day 29, participants reported by questionnaire whether they tolerated the supplement, supplementation Lck protocol, as well as report any medical problems and/or symptoms they may have encountered throughout the study. Statistical analysis With the MI-503 exception of the MRFs, all data were analyzed with separate 2 (group) × 2 (time) univariate ANOVA with repeated measures on the time factor with SPSS for Windows Version 16.0 software (SPSS inc., Chicago, IL). Significant differences among groups were identified by a Tukey HSD post-hoc test. For the MRFs, the percent changes from Day 0 to Day 29 were analyzed with separate independent group t-tests (p < 0.05). A probability level of ≤ 0.05 was adopted throughout. Results Subject demographics Twenty participants began the study; however, two dropped out due to reasons unrelated to the study. As a result, 18 participants completed the study. The PL group (n = 9) had an average (± SD) age of 22.77 ± 4.91 yr, height of 179.49 ± 8.