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.
About Folding. For most people's purposes, a fold is made when a piece of paper is creased and bent over on itself. You can fold the paper again in a different location, but this does not technically count as an additional fold. For paper folding experiments, the paper must be folded in half each time. The problem is that paper folding is exponential. Each time a piece of paper is folded, the layers double.