Cesium Klentaq C LA is a DNA polymerase mixture containing Cesium Klentaq C, a cold-sensitive mutant of Klentaq1 (5'-exonuclease deficient Taq polymerase with improved fidelity and thermostability).  Due to its suppressed activity at low temperatures this enzyme is designed for hot start PCR performance.  The Long-and-Accurate feature allows amplification of longer products with higher fidelity and accuracy.  LA enzymes are not recommended for use with dUTP.