Confidence votes 11. According to Wikipedia, the width of the Atlantic Ocean at its narrowest point is 2,848 kilometers (1,770 mi) between Brazil and Sierra Leone.
What causes PNH? It is not fully understood why people develop PNH. Inside the bone marrow, blood cells are made by stem cells (the seed cells of the marrow). PNH occurs due to a change (or mutation) in a gene in one of the stem cells in the bone marrow. This mutation happens in a gene called PIG-A and the cells made by this stem cell lack certain proteins on their surface making them âweakerâ than normal blood cells.
Listen. 1  Pseudohypoparathyroidism is caused by changes (mutations) in a number of different genes including the GNAS1 gene. When this gene is not working correctly, the body is not able to properly respond to parathyroid hormone, which increases the level of phosphorous in the blood and decreases the level of calcium.