Table 1.

Equivalents of coupling reagents used for PNA-PEO solution coupling and degree of amine conversion obtained.

Eq. ratio HATU/DMAP	% of amine modification	Eq. ratio PyOxim:TEA	% of amine modification
1	0	10:2	0
10	44	10:10	33
30	90	10:20	52.1
36	100	20:20	72.3
		40:30	100