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.
For states, electricians earned their highest wages in Alaska, averaging $34.63 per hour; New York, at a mean $33.98 hourly; and Illinois, averaging $33.86 per hour. The best-paying metro areas were Vallejo, California, averaging an hourly $39.33; New York City, at a mean $38.34 per hour; and Fairbanks, Alaska, at a mean $37.31 per hour.