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Similar to how it clusters terms, DAVID clusters genes. The groups large gene lists into families of related genes (e.g., protein kinases, transcription factors, or immunoglobulins). This is invaluable when a researcher has 500 genes and wants to see at a glance which functional families are most abundant.

You must specify the "background" or "universe." For most experiments, the default is the whole genome of your selected species (e.g., Homo sapiens ). However, for custom arrays or targeted sequencing, you can upload a custom background list to avoid false positives. david bioinformatics resources