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.
Average Electrician Pay vs. Other Best Jobs. The mean salary for an electrician was $53,560 in 2013, more than that of a carpenter ($44,980) and construction worker ($35,020). Construction managers, however, earn far more than electricians, with an average salary of $92,700 a year.