WarmStart® is the term we use to describe a mesophylic enzyme that is inactive at room temperature, and activated when the reaction is warmed above approximately 40°C. The WarmStart technology can be found in the following products: Bst 2.0 WarmStart DNA Polymerase (NEB #M0538), WarmStart RTx Reverse Transcriptase (NEB #M0380), Luna one-step RT-qPCR products (www.lunaqpcr.com), WarmStart Nt.BstNBI (NEB #R0725) and WarmStart Afu Uracil-DNA Glycosylase (UDG) (NEB #M1282S).
For more information on our use of aptamers to control enzyme activity, refer to this article.