The next phase of aerobic respiration is the Citric Acid Cycle, also known as the Kreb's Cycle, named for the biochemist who discovered it. To prepare for this stage, the pyruvate molecules from glycolysis are converted to a 2-carbon compound called Acetyl CoA.
Commercial pilots working in nonscheduled air transportation earned $78,010 on average in 2011, the bureau says. Those employed by technical schools and trade schools averaged $66,070, and workers providing support activities for air transportation earned $71,440.
According to 2012 data from the Bureau of Labor Statistics, commercial pilots (which includes both helicopter and non-airline fixed-wing pilots) earned a median annual income of $73,280, with the middle 50% earning between $53,050 and $96,810.