As an essential amino acid, leucine cannot be synthesized by animals. Consequently, it must be ingested, usually as a component of proteins. In plants and microorganisms, leucine is synthesised from pyruvic acid by a series of enzymes:
Electricians in California earned an average of $27.33 per hour and $56,840 per year as of May 2009, according to the U.S. Bureau of Labor Statistics. Average annual salaries in California were more than 11 percent above the U.S. national average of $50,850.
Locations. Electrical engineers looking for the highest pay in 2011 worked in Massachusetts to earn a mean annual $102,160. Other states with the highest mean annual wages were Alaska at $96,240, California at $95,370 and the District of Columbia at $92,840.