nucleus in its molecular structure. They are somtimes combined with beta-lactamase inhibitor, which protects the penicillin from bacterial enzymes that may destroy it before it kills the bacteria. The inhibitor functions by preventing the synthesis of the peptidoglycan layer on cell wall of the bacteria. One example of a broad spectrum beta-lactam antibiotic is co-amoxiclav which is a mixture of amoxicillin and clavulanic acid. The commercial drug name made from this antibiotic is Augmentin.


references:
http://www.answers.com/topic/penicillin

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TG1-4R7NR61-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=1157720909&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=338013b953495b152ef3b0d822d884c2

http://en.wikipedia.org/wiki/Broad-spectrum_antibiotic
Edited by Deepak