1 P15502-ELN_HUMAN. 2  Hydroxylation on proline residues within the sequence motif, GXPG, is most likely 4-hydroxy as this fits the requirement for 4-hydroxylation in vertebrates.
An API number is a unique and permanent number that identifies each well drilled for oil and gas in the United States. API numbers were established by the American Petroleum Institute, as an industry standard, to keep track of the nearly three million oil and gas drills in the country. It was necessary because wells usually have names that consist of three parts: an operator name, a well number and a lease name.
Gas fireplace inserts and gas logs produce a steady flame. Gas fireplaces provide a reliable source of heat and add beauty to a room design. You have two basic options for a natural gas or propane-fueled fireplace -- gas logs and gas fireplace inserts. Both produce heat and help a living space feel warm and inviting, but each has its own advantages and disadvantages.