Actinobacteria are a group of Gram-positive bacteria with high G+C ratio. They can be terrestrial or aquatic. Use of the ferric uptake regulator (fur) has been suggested for classification. Analysis of glutamine synthetase has also been suggested. Characteristics They include some of the most common soil life, freshwater and marine life, playing an important role in decomposition of organic materials, such as cellulose and chitin and thereby playing a vital part in organic matter turnover and c… (More on Actinobacteria)