The NanoLC-Ultra chromatography system delivers gradient precision at pressures to 10,000 psi and is offered for chromatographic separation of complex peptide mixtures. It can be used with long columns and accommodates columns packed with small particles. Self-priming and self-purging pumps facilitate solvent changes. A temperature-controlled column compartment maintains retention time reproducibility. The system can operate in a “peak parking” mode, with the flow rate temporarily decreased, to facilitate longer mass spectrometry interrogation of the analyte. Eksigent, 888-626-6356, www.eksigent.com.