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