A mask aligner does not move the photomask nor the wafer during exposure. Each aligner moves teeth .25 to .33 millimeters. The aligner is removed for brushing, flossing and eating. BFAST is a universal DNA sequence aligner tool developed at UCLA by Nils Homer. Each aligner is worn for 22 hours a day for one to two weeks. BLASR (a long read aligner from PacBio) was used in this process. Ca Clear Aligner is fabricated by Scheu Dental GmbH, Germany. In April 2009, CodonCode Aligner had been cited in more than 400 scientific publications.