Bioinformatics glossary – Q

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A DNA, RNA of protein sequence used to search a sequence database in order to identify close or remote family members (homologs) of known function, or sequences with similar active sites or regions (analogs), from whom the function of the query may be deduced.

Represents the quality function of Ca-alignment, maximized by the SSM alignment algorithm. Quality of alignment is a complex characteristics, which takes both the alignment length and RMSD into account.

The arrangement of multiple foled protein or coiled protein molecules in a multi-subunit complex.

A molecule that absorbs the fluorescence emitted by the reporter molecule.

PDBeQuips are short articles and tutorials on structures picked from the PDB archive.