Samples were prepared as described by Kohn et al. (2007c), with modifications. A small piece of frozen tissue was weighed and 100 mM potassium phosphate buffer, pH 7.30, added to a ratio of 1:19. The tissue was homogenized on ice using a Teflon tip, after which it was sonicated twice for 10 s at 6 W using a micro sonication probe (Virtis Virsonic Ultrasonic Cell Disrupter 100) and centrifuged at 1700 g for 5 min (4 °C). Enzyme assays were performed using the supernatant, whereas a small part of the pellet was diluted with sample buffer (5% β-mercaptoethanol, 2.5% SDS, 10% glycerol, 62.5 mM Tris, pH 6.8 and 0.1% bromophenol blue). These latter samples were heated to 95 °C for 3 min and used for determining the MHC isoform content and Western blot analyses. A rat muscle sample obtained from a previous published study was included to serve as control for the MHC IIb isoform on Western blots (Smith et al., 2008).
Samples were prepared as described by Kohn et al. (2007c), with modifications. A small piece of frozen tissue was weighed and 100 mM potassium phosphate buffer, pH 7.30, added to a ratio of 1:19. The tissue was homogenized on ice using a Teflon tip, after which it was sonicated twice for 10 s at 6 W using a micro sonication probe (Virtis Virsonic Ultrasonic Cell Disrupter 100) and centrifuged at 1700 g for 5 min (4 °C). Enzyme assays were performed using the supernatant, whereas a small part of the pellet was diluted with sample buffer (5% β-mercaptoethanol, 2.5% SDS, 10% glycerol, 62.5 mM Tris, pH 6.8 and 0.1% bromophenol blue). These latter samples were heated to 95 °C for 3 min and used for determining the MHC isoform content and Western blot analyses. A rat muscle sample obtained from a previous published study was included to serve as control for the MHC IIb isoform on Western blots (Smith et al., 2008).
การแปล กรุณารอสักครู่..