emm6.21 (emm-cluster M6) subtype-determining sequence encoding the 
C terminal 10 signal sequence residues and the N terminal 50 residues of 
the mature M protein. subtype emm6.21 first found in year 2002-2003 U.S. 
pediatric surveillance isolate WA03-93.
 
emm6.21.sds  Length: 180  September 7, 2006 10:32  Type: N  Check: 5644  ..

       1  TTAGTTGTCA ATACTAATGA AGTTAGTGCA AGAGTGTTTC CTAGGGGGAC 

      51  GGTAGAAAAC CCGGACGAAG CACGAGAACT TCTTAACAAG TATGACGTAG 

     101  AGAACTCTAT ATTACAAGCT AATAATGACA AGTTAACAAC TGAGAATAAA 

     151  AACTTAACAG ATCAGAATAA GGAGTTAAAA