common method for select first sequence
common method for select first sequence

Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/iMADS,Duke-GCB/TF-DNA-PredictionsDB,Duke-GCB/iMADS,Duke-GCB/iMADS,Duke-GCB/iMADS