Tyrosine, for example, can convert to phenylalanine, while serine can be created from molecules that are produced during the burning of carbohydrates for energy. The non-essential amino acids include alanine, asparagine, aspartate, cysteine, glutamate, glutamine, glycine, proline, serine and tyrosine. Arginine is also non-essential unless you are in a period of growth.
Pleuritic chest pain. Pleuritic chest pain: Introduction. Any type of chest discomfort or chest pain, with or without breathing difficulty, is a serious symptom that's likely to put you first in the queue at the Emergency Room.
What is pleurisy? Pleurisy is inflammation of the pleura, the thin, double-layered membrane that surrounds the lungs and lines the inside of the chest. When these layers become irritated or inflamed, they rub against each other, causing pain when a person breathes. What are the symptoms? The main symptom of pleurisy is chest pain.