HEADER    VIRAL PROTEIN                           31-DEC-69   6Y5K
TITLE     Extended Intermediate form of X-31 Influenza Haemagglutinin at pH 5
TITLE   2 (State IV)
COMPND    MOL_ID: 2;
COMPND   2 MOLECULE: X-31 Influenza Haemagglutinin HA2;
COMPND   3 CHAIN: B, D, F;
COMPND   4 ENGINEERED: YES;
EXPDTA     ELECTRON MICROSCOPY
DBREF  6Y5K B    1   172  UNP    P03437   HEMA_I68A0     346    517
SEQRES   1 B  133  ASP LEU LYS SER THR GLN ALA ALA ILE ASP GLN ILE ASN
SEQRES   2 B  133  GLY LYS LEU ASN ARG VAL ILE GLU LYS THR ASN GLU LYS
SEQRES   3 B  133  PHE HIS GLN ILE GLU LYS GLU PHE SER GLU VAL GLU GLY
SEQRES   4 B  133  ARG ILE GLN ASP LEU GLU LYS TYR VAL GLU ASP THR LYS
SEQRES   5 B  133  ILE ASP LEU TRP SER TYR ASN ALA GLU LEU LEU VAL ALA
SEQRES   6 B  133  LEU GLU ASN GLN HIS THR ILE ASP LEU THR ASP SER GLU
SEQRES   7 B  133  MET ASN LYS LEU PHE GLU LYS THR ARG ARG GLN LEU ARG
SEQRES   8 B  133  GLU ASN ALA GLU GLU MET GLY ASN GLY CYS PHE LYS ILE
SEQRES   9 B  133  TYR HIS LYS CYS ASP ASN ALA CYS ILE GLU SER ILE ARG
SEQRES  10 B  133  ASN GLY THR TYR ASP HIS ASP VAL TYR ARG ASP GLU ALA
SEQRES  11 B  133  LEU ASN ASN