<P> In experimental biophysics, the activity of molecular motors is observed with many different experimental approaches, among them: </P> <Ul> <Li> Fluorescent methods: fluorescence resonance energy transfer (FRET), fluorescence correlation spectroscopy (FCS), total internal reflection fluorescence (TIRF). </Li> <Li> Magnetic tweezers can also be useful for analysis of motors that operate on long pieces of DNA . </Li> <Li> Neutron spin echo spectroscopy can be used to observe motion on nanosecond timescales . </Li> <Li> Optical tweezers (not to be confused with molecular tweezers in context) are well - suited for studying molecular motors because of their low spring constants . </Li> <Li> Scattering techniques: single particle tracking based on dark field microscopy or interferometric scattering microscopy (iSCAT) </Li> <Li> Single - molecule electrophysiology can be used to measure the dynamics of individual ion channels . </Li> </Ul> <Li> Fluorescent methods: fluorescence resonance energy transfer (FRET), fluorescence correlation spectroscopy (FCS), total internal reflection fluorescence (TIRF). </Li> <Li> Magnetic tweezers can also be useful for analysis of motors that operate on long pieces of DNA . </Li>

Molecular motors use atp as the energy source to power the molecular motors