Table 7: Isostericity Matrix for cis Watson-Crick/Sugar Edge geometry. Parentheses indicate modeled interactions, not yet observed in high-resolution x-ray structures.

Sugar Edge

Watson-Crick

A

C

G

U

A

I1

I1

I1

I1

C

I2

I2

I2

I2

G

(I3)

I3

I3

I3

U

I4

(I4)

I4

(I4)