2,3-DPG. An organic phosphate in red blood cells that alters the affinity of hemoglobin for oxygen. Blood cells stored in a blood bank lose 2,3-diphosphoglycerate, but once they are infused, the substance is resynthesized or reactivated.
Definition of soft fold. : the fold that results when paper is lapped.
A fold is a rock formation that's been made by flat rocks becoming deformed due to stress and pressure. Folds are created when two plates that make up the earth's crust collide. As the plates are forced together they bend, curve, or make jagged patterns in the rock.