The Staden file format is used to store data from DNA sequencing instruments. Each file contains the data for a single reading and includes the called sequence as well as additional data obtained from the reading. This file format was first described in
Dear, S and Staden, R. "A Standard file format for data from DNA sequencing instruments", DNA Sequence 3, 107-110, (1992)
MEGA is able to display the contents of a Staden-formatted trace file using MEGA’s Trace File Editor, which is part of the Alignment Explorer.