Stars have fascinated us since the beginning of history. For eons, mankind has looked to the heavens and wondered at the stars in the sky. Ancient people believed they could see shapes among the stars.
Beta-lactam antibiotics. Î²-Lactam antibiotics are the most widely used class of drugs for the treatment of bacterial infections and have been prescribed for over 70 years (Crowder, Spencer, & Vila, 2006; Daumann, Schenk, & Gahan, 2014; Page & Badarau, 2008; Phelan et al., 2014). From: Advances in Protein Chemistry and Structural Biology, 2014
Beta-lactamases are enzymes (EC 3.5.2.6) produced by some bacteria that provide resistance to Î²-lactam antibiotics like penicillins, cephamycins, and carbapenems (ertapenem), although carbapenems are relatively resistant to beta-lactamase.eta-lactamase provides antibiotic resistance by breaking the antibiotics ' structure. These antibiotics all have a common element in their molecular structure: a four-atom ring known as a Î²-lactam.