Table 2 Binding affinities of receptors 1 and 2 to Lys, Arg and Orn methyl ester hydrochlorides determined by ITC experiments in PBS buffer (pH 7.4)

From: Glucose-derived receptors for photo-controlled binding of amino acid esters in water

Guesta

Receptor 1

Receptor 2

KaZb

KaE

Inc.c

KaZ

KaE

Inc.

l-Lys

758 ± 313

188 ± 98

4.0

792 ± 305

252 ± 114

3.1

l-Arg

782 ± 207

221 ± 115

3.5

704 ± 274

257 ± 108

2.7

l-Orn

621 ± 213

176 ± 69

3.5

839 ± 266

260 ± 126

3.2

  1. aH-AA-OMe x HCl were used as guests; bKa values are reported in M-1; cKa increase for Z- vs E-receptor molecule; Bold font indicates the examples where highest binding selectivity in favour of the Z isomer was observed.