Gastric acid network (called canaliculi) from which the hydrochloric acid is secreted into the lumen of the stomach. The pH of gastric acid is 1.5 to 3.5 in the human stomach lumen, the acidity being maintained by the proton pump H/K ATPase. The parietal cell releases bicarbonate into the bloodstream in the process, which causes a temporary rise of pH in the blood, known as an alkaline tide. The highly acidic environment in the stomach lumen causes proteins from food to lose their characteristic folded structure (or denature). This exposes the protein's peptide bonds. The gastric chief cells of the stomach secrete
Break Down (EP) Break Down (EP) Break Down is the debut Korean solo mini album of Kim Hyun-joong of South Korean boy band SS501. It was released on 7 June 2011 under KeyEast Entertainment. A Limited Edition was released on 23 June 2011, with a bonus DVD with music videos and behind-the-scene footages. The album was released in Taiwan by Warner Music Taiwan in two versions: Regular and Commemorate Editions. Kim's songs were produced by Steven Lee, who had composed SS501's hits "Love Like This" and "Love Ya". The title track "Break Down" is a high energy dance track featuring Double K. Another