| ZnCl2 conc, mM | ALAS activity, nmoles ALA formed h−1 g−1 fr wt In Light | ALAS activity,moles ALA formed h−1 g−1 fr wt In Dark | ALAD activity, nmoles PBG formed h−1 g−1 fr wt |
| 0 | 64 ± 4 (100) | 77 ± 5 (100) | 140 ± 25 (100) |
| 0.001 | 69 ± 7 (108) | 71 ± 5 (92) | 149 ± 10 (107) |
| 0.1 | 74 ± 7 (116) | 68 ± 8 (88) | 159 ± 10 (114) |
| 1 | 80 ± 3* (125) | 88 ± 7 (114) | 168 ± 6 (121) |
| 5 | 108 ± 19 (169) | 96 ± 10 (125) | 180 ± 3 (129) |
| R2 value | 0.960 | 0.728 | 0.691 |