Table 1.
Apparent KD (nM ±SD) of various cytokinin–receptor complexes tested in the plant assay systemData correspond to assays at pH 7.4 and 0–4 °C
| Cytokinin base | AHK2 | AHK3 | ZmHK1 |
|---|---|---|---|
| trans-Zeatin (tZ) | 1.93±0.26 | 4.26±1.69 | 7.97±1.96 |
| cis-Zeatin (cZ) | 130±18 | 1602±326 | 8.39±2.58 |
| Isopentenyladenine (iP) | 1.42±0.52 | 42.0±13.5 | 0.61±0.27 |
| Benzyladenine (BA) | 26.9±9.9 | 359±10 | 1.22±0.56 |
| Dihydrozeatin (DZ) | 161±55 | 33.1±6.2 | 128±47 |
| Thidiazuron (TD) | 4.76±2.05 | 8.23±1.20 | 40.1±12.9 |
| Adenine | ND | >10 000 | >10 000 |
| Activity ranking | iP≥tZ>TD>BA>cZ≥DZ | tZ>TD>DZ≥iP>BA>cZ | iP≥BA>tZ≈cZ>TD>DZ |
ND, not determined.