The kinetics of amyloid formation from conformational conversion of a peptide or protein into its fibrillar form (amyloid) is studied using fibrillation assays using a spectrophotometer. This technique requires extremely low background fluorescence of the unbound probe and Thioflavin T has been widely used for this reason. The kinetic profile typically includes a lag phase that is followed by a rapid exponential growth phase and a plateau phase. As shown in the figure, Thioflavin T can reliably identify the presence of amyloid fibrils but are limited in detecting prefibrillar aggregates. Amytracker™ binds and detects prefibrillar aggregates present during the initial lag phase as well as mature amyloid fibrils. Therefore, the lag phase is shortened significantly when investigating amyloid formation using Amytracker™. Amytracker™ has been used to study fibrillation of recombinant Aβ1-40 and Aβ1-42 as well as lysozyme and insuline.