Primacell* 1Human Esophagus OptiTDS*1 kit^ Kit, Primacell* 1Human Esophagus OptiTDS*1: Tissue Dissociation System, A mixture of collagenase I, collagenase III, collagenase IV, collagenase, and trypsin, Stability/Storage: Stable at the room temperature, stored at -20 deg C