Sequences of oligonucleotide probes for sub-typing of N1 neuraminidase.

*The total number of cDNA sequences in this analysis was 2623.**The number of point substitutions in each probe is given in brackets. For instance, “1(0) N2” is a perfect probe for N9 neuraminidase; “35(1)+16(2) N9” means that 35 and 16 sequences of N9 neuraminidase contain oligonucleotide probe that differs from the current probe by one or two point substitutions, respectively.***Probes that were not used in further experiments.