A subphylum of chordates intermediate between the invertebrates and the true vertebrates. It includes the Ascidians.
The only species of a cosmopolitan ascidian.
A family in the order Rhodobacterales, class ALPHAPROTEOBACTERIA.
The relationships of groups of organisms as reflected by their genetic makeup.
The process of cumulative change at the level of DNA; RNA; and PROTEINS, over successive generations.
The genetic complement of an organism, including all of its GENES, as represented in its DNA, or in some cases, its RNA.
The relative amounts of the PURINES and PYRIMIDINES in a nucleic acid.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
A multistage process that includes cloning, physical mapping, subcloning, determination of the DNA SEQUENCE, and information analysis.