The hydrogen peroxide-oxidation of o-phenylenediamine (OPD) catalyzed by horseradish peroxidase (HRP) at 37 Â°C in 50 mM phosphate buffer (pH 7.0) was studied by calorimetry.
The Spartan Beast is 10+ miles. The Super Spartan is 8-10 miles and the Spartan Sprint is 5k. The distances are estimate because no two courses are the same. The race I completed was the Super Spartan. The course was at Vail Lake Resort in Temecula, CA. Upon registering for the run you select start times.
The series include the Spartan Sprint, the Super Spartan, the Spartan Beast, and the Ultra Beast. Spartan Race also has a military series in which an obstacle course is designed by the United States military. There are also winter and team events.