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Table 1 Predicted CD4+ HA T cell epitopes of A(H1N1)pdm09 viruses and their conservancy in seasonal H1N1 (1977–2009) viruses

From: T cell memory to evolutionarily conserved and shared hemagglutinin epitopes of H1N1 viruses: a pilot scale study

Predicted CD4+ T- cell epitopes (15 a. a) (epitope position)

% of predicted epitope conservancy in seasonal H1N1(1977–2009) HA proteins

% seasonal H1N1(1977–2009) isolates with each of the conserved epitope

% A(H1N1)pdm09 (2009–2010) isolates with each of the conserved epitope

VLEKNVTVTHSVNLL

100

100

99

(HA1 19–33)

   

EELREQLSSVSSFER

100

100

99

(HA1 99–113)

   

QLSSVSSFERFEIFP

100

100

99

(104–119)

   

ATGLRNIPSIQSRGL

93

97

98

(HA1 315–329)

   

GLRNIPSIQSRGLFG

100

97

100

(HA1 317–331)

   

RNIPSIQSRGLFGAI

100

97

98

(HA1 319–333)

   

QSRGLFGAIAGFIEG

100

100

100

(HA1 325339)

   

NKVNSVIEKMNTQFT

100

96

99

(HA2 377–391)

   

VIEKMNTQFTAVGKE

100

96

99

(HA2 382–396)

   

DGFLDIWTYNAELLV

100

96

99

(HA2 413–427)

   

WTYNAELLVLLENER

100

99

100

(HA2 419–433)

   

TYNAELLVLLENERT

100

99

100

(HA2 420–434)

   

YNAELLVLLENERTL

100

100

100

(HA2 421–435)

   

LVLLENERTLDYHDS

100

98

100

(HA2 426–440)

   

I YQILAIYSTVASSL

93

100

100

(HA2 510–524)

   

YQILAIYSTVASSLV

100

100

100

(HA2 511–525)

   

STVASSLVL L VSLGA

93

100

98

(HA2 518–532)

   

GAISFWMCSNGSLQC

100

98

99

(HA2 531–545)

   
  1. Bold faced epitopes were used in in vitro assays.