Fig. 1From: Myostatin as a mediator of sarcopenia versus homeostatic regulator of muscle mass: insights using a new mass spectrometry-based assayCalibration curves for LC-MS/MS measures of myostatin, propeptide, GASP-1, and FLRG. Linear calibration curves for recombinant intact myostatin (a), propeptide (b), GASP-1 (c), and FLRG (d) diluted into bovine serum albumin over a concentration range of 0.031 to 1.00Â nMBack to article page