. 2014 Nov 12;9(11):e109535. doi: 10.1371/journal.pone.0109535

Table 1. The lowest stimulatory concentrations of pyridines that induced larvae of C. teleta to metamorphose compared with the K_M of these same chemicals on the pyridine-activated ion channel of the crayfish A. torrentium.

	Species
Chemical	C. teleta	A. torrentium
Pyrazinecarboxamide	1 µM	1.5 µM
Nicotinamide	3 µM	10 µM
Nicotinic acid	1 mM	>1 mM
4-acetylpyridine	200 µM	70 µM

The concentration of 4-acetylpyridine that inhibited 50% of the larvae of C. teleta is also compared with the IC₅₀ of 4-acetylpyridine for the crayfish (adapted from Hatt and Schmiedel-Jacob, 1984).

Table 1. The lowest stimulatory concentrations of pyridines that induced larvae of C. teleta to metamorphose compared with the KM of these same chemicals on the pyridine-activated ion channel of the crayfish A. torrentium.

Table 1. The lowest stimulatory concentrations of pyridines that induced larvae of C. teleta to metamorphose compared with the K_M of these same chemicals on the pyridine-activated ion channel of the crayfish A. torrentium.