For each domain, the mean depth of the minor groove in the contact zone of the domain was calculated with the program Curve+.

Three numbers A (B-C) means: A is the average value of the depth among all domains of the family, B is the minimum and C is the maximum.

The dash "-" means that the minor groove cannot be determined for the DNA in the contact zone of domains of the family.

One number means that only for one domain of the family the minor groove was determined