Rapid Biochemical Kinetics Core

The Rapid Biochemical Kinetics Core Facility provides equipment that allows UT Southwestern Medical Center investigators to make pre-steady state measurements of biochemical reactions on the 1-1000 ms time scale.

The facility supports two BioLogic rapid-mixing devices that can be used for either optical stopped flow or quench flow experiments. Available stopped flow spectroscopy modes include absorbance, multi-wavelength absorbance, fluorescence (including multi-wavelength and polarization) and CD. Dead times approach 1 ms, minimum data acquisition time is about 1 ms, and minimal reagent volumes approach 20 microliters per shot. One mixer has three syringes and another has four, all independently controlled by stepper motors. Mixers and spectroscopy components are computer-controlled to allow for complex multi-stage mixing protocols.

The core also houses and maintains a PTI LaserStrobe fluorometer that is capable of determining fluorescence lifetimes in the nanosecond-microsecond time range, for both small organic fluorophores and rare earth chelates.  Access and billing are coordinated by the Live Cell Imaging Core Facility.

The Rapid Biochemical Kinetics Core Facility provides no technical support. Each investigator is responsible for experimental design and execution. Software for control, data acquisition and data analysis is provided. Investigators interested in using these facilities should first contact the director to discuss feasibility and to arrange training. Use is generally restricted to faculty members, postdoctoral researchers, and advanced graduate students.


User fee is $100 per day or fraction thereof. Frequent users with NIH funding may join the users group, which replaces user fees with periodic assessments for maintenance costs, usually less than $1,000 per year. Priority for use is given to the user group, other NIH-funded investigators at UT Southwestern, and then to others. Accessibility is rarely a problem.

Facility Location

UT Southwestern North Campus
6001 Forest Park Blvd.
Dallas, TX 75390