In a microarray experiment, the target is labelled population of molecules corresponding to the RNA or DNA extracted from mixtures of cells, tissues, cell cultures or other samples. This labelled population of molecules is often referred to erroneously as the probe.

Tentative Consensus Sequence. EST sequences can be clustered together using assembly programs to form TCs.

An event in which a eukaryotic cell enslaves another eukaryotic cell that possesses a plastid derived from a secondary endosymbiosis (see secondary endosymbiosis). This has occurred several times in the dinoflagellates, and the captured plastid is thought to have replaced a pre-existing Secondary plastid (see also endosymbiosis).

A tool that can be used to calculate, how well tetranucleotide usage patterns in DNA sequences correlate. Such correlations can provide valuable hints about the relatedness of DNA sequences.

TIGR Gene Index Clustering tools.

A database designed to capture experimental or inferential results that support submitter-provided annotation for sequence data that the submitter did not directly determine but can be derived from DDBJ/EMBL/GenBank primary data.

The full complement of transcripts in a given species.

High-throughput analysis of the rnRNA transcripts present in a cell type, a tissue or an organism.