DBNascent is a large catalog of previously published sequencing data that is primarily focused around nascent transcription assays. It currently contains 2888 individual samples derived from 288 individual experiments.

Metadata from publications and from the Gene Expression Omnibus and Short Read Archive databases have been manually curated to describe many aspects of sample types, conditions, and protocols. Samples have then been processed with a standardized pipeline to mapped files, and further analyses have been conducted on human and mouse samples to obtain read locations of bidirectional transcription and read counts over several annotation sets.