English literature - Student Encyclopedia (Ages 11 and up) The writers of the British Isles, including England, Scotland, and Wales, have produced a great wealth of literature. The language in which English literature is written has evolved over hundreds of years and is still changing.
The indole test is a biochemical test performed on bacterial species to determine the ability of the organism to split indole from the amino acid tryptophan.
As some bacteria digest tryptophan, one product sometimes produced is indole, a compound responsible for the smell of feces. Tryptone broth is frequently used for the indole test, important for identifying enteric bacteria.acteria are identified based largely on what organic compounds they can break down. The range of compounds used depends on the collection of enzymes a species of bacteria can make. Tryptophan is an amino acid that some bacteria can use for carbon and energy.