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 and Median Earnings. As of 2011, electricians earned an average of $52,910 per year, according to the Bureau of Labor Statistics. The average hourly pay for an electrician was estimated to be $25.44.The median annual income of electricians in the United States was $49,320, and the median-earning 50 percent of electricians made between $37,570 and $65,260 a year.As of 2011, the highest-paid electricians were those who taught at business schools. These workers earned an average of $79,250 a year.Most electricians worked as building equipment contractors, earning an average annual income of $52,600. Electricians employed by local governments tended to earn slightly above the national average for this occupation and made an average annual income of $57,580.hese workers earned an average of $79,250 a year. Most electricians worked as building equipment contractors, earning an average annual income of $52,600. Electricians employed by local governments tended to earn slightly above the national average for this occupation and made an average annual income of $57,580.