Fluorescence-based, automated DNA sequencers represent on of the major
advances in recent molecular biology. Two main technologies have been
developed in this field: the single-label/four-lane system and the fo
ur-label/one-lane system. The following presents the use of single-lab
el-sequencing chemistry, which resembles traditional radioactive DNA s
equencing, using the four-label system ABI 373A that expands its flexi
bility and obtains data that are immediately interpretable without sof
tware manipulation. This method has been named mixed-mode fluorescent
DNA sequencing. Here we show one of its possible applications in molec
ular genetic analysis.