HEADER    CELL CYCLE                              31-DEC-69   5SBB
COMPND    MOL_ID: 1;
COMPND   2 MOLECULE: Tubulin alpha-1B chain;
COMPND   3 CHAIN: A, C;
COMPND   4 MOL_ID: 2;
COMPND   5 Tubulin beta-2B chain;
COMPND   6 CHAIN: B, D;
EXPDTA     X-RAY DIFFRACTION
REMARK   2 RESOLUTION.    2.25 ANGSTORMS
REMARK 465 MISSING RESIDUES                                                    
REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE                      
REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN              
REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.)               
REMARK 465
REMARK 465   M RES C SSSEQI  
REMARK 465     ARG B   276
REMARK 465     GLY B   277
REMARK 465     SER B   278
REMARK 465     GLN B   279
DBREF  5SBB A    1   451  UNP    P81947   TBA1B_BOVIN      1    451
DBREF  5SBB B    1   455  UNP    Q6B856   TBB2B_BOVIN      1    445
SEQRES   1 B  186  GLY GLN LEU ASN ALA ASP LEU ARG LYS LEU ALA VAL ASN
SEQRES   2 B  186  MET VAL PRO PHE PRO ARG LEU HIS PHE PHE MET PRO GLY
SEQRES   3 B  186  PHE ALA PRO LEU THR SER ARG GLY SER GLN GLN TYR ARG
SEQRES   4 B  186  ALA LEU THR VAL PRO GLU LEU THR GLN GLN MET PHE ASP
SEQRES   5 B  186  SER LYS ASN MET MET ALA ALA CYS ASP PRO ARG HIS GLY
SEQRES   6 B  186  ARG TYR LEU THR VAL ALA ALA ILE PHE ARG GLY ARG MET
SEQRES   7 B  186  SER MET LYS GLU VAL ASP GLU GLN MET LEU ASN VAL GLN
SEQRES   8 B  186  ASN LYS ASN SER SER TYR PHE VAL GLU TRP ILE PRO ASN
SEQRES   9 B  186  ASN VAL LYS THR ALA VAL CYS ASP ILE PRO PRO ARG GLY
SEQRES  10 B  186  LEU LYS MET SER ALA THR PHE ILE GLY ASN SER THR ALA
SEQRES  11 B  186  ILE GLN GLU LEU PHE LYS ARG ILE SER GLU GLN PHE THR
SEQRES  12 B  186  ALA MET PHE ARG ARG LYS ALA PHE LEU HIS TRP TYR THR
SEQRES  13 B  186  GLY GLU GLY MET ASP GLU MET GLU PHE THR GLU ALA GLU
SEQRES  14 B  186  SER ASN MET ASN ASP LEU VAL SER GLU TYR GLN GLN TYR
SEQRES  15 B  186  GLN ASP ALA THR