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.
Chest Pain Causes: Lung Problems. Problems with the lungs can cause a variety of types of chest pain. These are common causes of chest pain: Pleuritis. Also known as pleurisy, this condition is an inflammation or irritation of the lining of the lungs and chest. You likely feel a sharp pain when you breathe, cough, or sneeze.