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.
State Salaries. Salaries for engineers can vary by state. Electrical engineers in California earned the highest mean annual salary in 2012 with $107,280.The top paying state for mechanical engineers in 2012, according to the BLS, was Alaska where the mean annual salary was $103,840.