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.
Sharp chest pain caused by pleurisy (pleuritis or lung inflammation) Pleurisy (pleuritis) can cause sharp pain in the chest when breathing due to friction of the pleura (a membrane that includes layers of tissue within the inner surface of the chest cavity. When the pleura becomes inflamed, the condition is called pleuritis.