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
Structure of the Month: Beta-lactamase Enzyme Structures. Beta-lactamases are enzymes produced by some Gram-negative and Gram-positive bacteria and are responsible for resistance to a broad class of-beta-lactam antibiotics, including penicillin.There are several groups and classes of beta-lactamases that result in antibiotic resistance.eta-lactamases are enzymes produced by some Gram-negative and Gram-positive bacteria and are responsible for resistance to a broad class of-beta-lactam antibiotics, including penicillin. There are several groups and classes of beta-lactamases that result in antibiotic resistance.