The computer system is used to calculate {HEAD ~ probabilities} for determining unknown bases by analyzing {TAIL ~ the fluorescence intensities} of hybridized nucleic acid probes on biological chips 
The computer system is used to calculate { HEAD ~ probabilities } for determining unknown bases by analyzing { TAIL ~ the fluorescence intensities } of hybridized nucleic acid probes on biological chips
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH