An ulcer in the lining of the stomach, duodenum, or esophagus. Peptic ulcers affect millions of people in the US yearly. Ulcer formation is related to Helicobacter pylori bacteria in the stomach, use of anti-inflammatory medications, and cigarette smoking. Peptic ulcer pain may not correlate with the presence or severity of ulceration. Complications of peptic ulcers include bleeding, perforation, and blockage of the stomach (gastric obstruction). Diagnosis is made via barium X-ray or endoscopy. Treatment involves use of antibiotics to eradicate H. pylori, elimination of risk factors, and prevention of complications.
An enzyme that can break down a peptide into its component amino acids.
A molecule consisting of 2 or more amino acids. Peptides are smaller than proteins, which are also chains of amino acids. Molecules small enough to be synthesized from the constituent amino acids are, by convention, called peptides rather than proteins. The dividing line is at about 50 amino acids. Depending on the number of amino […]
A compound that mimics the biological action of a peptide.
The percentage of individuals in a group who have achieved a certain quantity’such as height, weight, or head circumference’or a developmental milestone. For example, the fiftieth percentile for walking well is 12 months of age.
- Perception, auditory
The ability to identify, interpret, and attach meaning to sound.