Table 1.

Conversion matrix for nucleotide sequence

Potential hydrogen bonding position	w1	w2	w3	w3′	w2′	w1′
A/T	a	n	d	n	a	n
T/A	n	a	n	d	n	a
G/C	a	n	a	n	d	n
C/G	n	d	n	a	n	a

Each base pair can be converted to a representation of six potential hydrogen bonding positions. a, a potential hydrogen bond acceptor site; d, a potential hydrogen bond donor site; n, no hydrogen bonding.