Searching GenBank for sequences of interest is a remarkably simple process. The form boxes on this page allow you to enter descriptive information about the sequence you are seeking. In general, this is how most sequence retrieval pages function and it is a good example of the simplest type of sequence analysis tool available on the web. Cross-referencing attempts have been to reduce sequence duplication. The basic search permits the choice of a search program and uses default filtering parameters.
Advanced searches allow the selection of various additional filters.
Other NCBI resources demonstrate additional uses of genetic information. Online Mendelian Inheritance in Man. In this database you will find pictures and references, as well as text-based information. The NCBI Taxonomy database contains information about all the organisms present with at least one sequence in the genetic databases. This tool, like OMIM, demonstrates the power of interlaced or cross-referenced data, combining taxonomy with raw genetic information.