Bacitracin is a mixture of related cyclic peptides produced by organisms of the licheniformis group of Bacillus subtilis var Tracy, first isolated in 1945. These peptides disrupt both gram positive and gram negative bacteria by interfering with cell wall and peptidoglycan synthesis.acitracin is composed of a mixture of related compounds with varying degrees of antibacterial activity. Notable fractions include bacitracin A, A1, B, B1, B2, C, D, E, F, G, and X. Bacitracin A has been found to have the most antibacterial activity.
The university operates two medical schools (University of Arizona College of Medicine - Tucson and the University of Arizona College of Medicine - Phoenix) and is affiliated with the region's only academic medical centers (Banner - University Medical Center Tucson and Banner - University Medical Center Phoenix).
Arizona State University. Not to be confused with University of Arizona. Arizona State University (commonly referred to as ASU or Arizona State) is a public metropolitan research university on five campuses across the Phoenix, Arizona, metropolitan area, and four regional learning centers throughout Arizona.