The complete cDNA sequences of HA genes of two AIV isolates were presented in this paper The result of comparative sequence analysis seemed to suggest that these two isolates may be identical to three other AIV strain...The complete cDNA sequences of HA genes of two AIV isolates were presented in this paper The result of comparative sequence analysis seemed to suggest that these two isolates may be identical to three other AIV strains(H 9N 2) isolated from HongKong recently and these five strains may have the same origin in that the identity of the HA protein sequences of these AIV isolates is higher than 95%展开更多
Influenza virus strain A/PR/8/34(H1N1)acquired a high-yielding property after serial passages in fertilized eggsSix internal RNA segments of the high-yielding strain were sequenced from their cloned cDNAs and co...Influenza virus strain A/PR/8/34(H1N1)acquired a high-yielding property after serial passages in fertilized eggsSix internal RNA segments of the high-yielding strain were sequenced from their cloned cDNAs and compared with the corresponding original sequences in the prime A/PR/8/34(H1N1)strainNinety-three point mutations were found accumulated in six genes(PB2,PB1,PA,NP,M,and NS),which lead to 27 amino acid changesA significant low mutation frequency without amino acid change was observed in PA geneThe mutation frequency at the amino acid level was the highest(about 3%)in M2 proteinOur data suggest that the unequal distribution of mutations among different viral proteins may correlate with individual role of each protein in viral展开更多
文摘The complete cDNA sequences of HA genes of two AIV isolates were presented in this paper The result of comparative sequence analysis seemed to suggest that these two isolates may be identical to three other AIV strains(H 9N 2) isolated from HongKong recently and these five strains may have the same origin in that the identity of the HA protein sequences of these AIV isolates is higher than 95%
文摘Influenza virus strain A/PR/8/34(H1N1)acquired a high-yielding property after serial passages in fertilized eggsSix internal RNA segments of the high-yielding strain were sequenced from their cloned cDNAs and compared with the corresponding original sequences in the prime A/PR/8/34(H1N1)strainNinety-three point mutations were found accumulated in six genes(PB2,PB1,PA,NP,M,and NS),which lead to 27 amino acid changesA significant low mutation frequency without amino acid change was observed in PA geneThe mutation frequency at the amino acid level was the highest(about 3%)in M2 proteinOur data suggest that the unequal distribution of mutations among different viral proteins may correlate with individual role of each protein in viral
