1. Make a GIF picture of the PDB file that you find in assignment 7 by RasMol.Display it in cartoon form and color it by structure. Please make the orientation of the molecule just like the molecule in the picture of assignment 7 - 2.

2. Residues Glu173 and Arg177 are possible to form an ion pair (salt-bridge). (a) Draw a zoom-in picture of this pair. Show these two residues in sticks and color with cpk. The rest of protein in backbone form. (b) Measure the distance between Glu173A.OE and ARG177A.NH.

for easy to check the atons we want ,display two residues in ball and stick,

set picking label to check the residues we want,then set picking distance to get the answer

3. Show a protein fragment with residues 622 to 699 only. Show them in cartoon form and color with temperature.

restrict 622-699

display in cartoon

color with temperature

4. Make a stereo picture for only the atoms within 6.0 Angstrom of Phe721. Show this residue in green color, others in cpk and all the residues in wireframe 0.1 format.

restrict within (6.0,721)
select 721
color green
wireframe 0.1
stereo