Development Level Summary shows previous development milestones reached, as well as progress towards incomplete milestones. CDK13 is a Tchem target, which means that multiple active ligands have been discovered, but no approved drugs as of yet. It has also been fairly well published about, both in text-mined PubMed literature reviews, and GeneRIF annotations (Jimeno-Yepes, Sticco, Mork, & Aronson, 2013). Its molecular function (from GO Gene Ontology (Ashburner et al., 2000)) is also fairly well known.