Critique of Radiograph #24. 1  The diagnostic standard for the AP cervical spine view includes: 2  Demonstration of vertebrae C3 through T1, even if the patient is in a cervical collar. All soft tissues of the neck should be included on the AP view. 3  Radiograph density should include good penetration of the entire spine.
The enzyme named pepsin is released by some chief cells that can be found in the stomach. This enzyme has the capability and the role of degrading food proteins into peptides, thus producing digestion. Discovered in 1836, pepsin was the first revealed enzyme and also the first that was crystallized.
Pepsin is a digestive protease, a member of the aspartate protease family. Pepsin is one of three principal protein-degrading, or proteolytic, enzymes in the digestive system, the other two being chymotrypsin and trypsin.The three enzymes were among the first to be isolated in crystalline form.epsin is expressed as a pro-form zymogen, pepsinogen, whose primary structure has an additional 44 amino acids. In the stomach, chief cells release pepsinogen.