1.   (1) David Liu would like to know the possible functional sites of
         his new protein (from hw6). Please help him to identify any 
         biologically significant sites or patterns.

     (2) Please help him to analyze the enzymatic digestion by  trypsin 
         and  endoproteinase Glu-C.

     (3) Calculate the molecular weight of this protein.
         6917.21
   
2. Pick up one bioinformatic site 
and prepare to introduce to your classmates on 1/8.