: A 2575 (OTTO) D-Arabinose, GR 99%+ Cas 10323-20-3 - used in culture media for some bacteria. It serves as a component of biopolymers such as hemicellulose and pectin. In the synthetic biology laboratory, it is employed as a reversible switch for protein expression under the Pbad promoter (i.e. part of plasmids) in E. coli.