1CMA: E. coli Met Repressor

In the structure at the right, of E. coli Met Repressor complexed with a strand of DNA, identify the following characteristics:

• The palindromic sequence of the DNA
• The "b-ribbons" of the repressor that insert themselves into the major grooves of the DNA
• Some of the H-bonding contacts at the interfaces
• The relationship between the anti-parallel N-terminal helices and the relationship between the 2 helices and the DNA strand
• Some potential contacts between the two helices