TABLE 2.

Using competition ELISA tests (data obtained from the data sheet of GEMACBIO), cross-reactivity was calculated from the displacement curves at half-displacement: the best recognized was methionine-Gc, whose concentration was divided by the concentration of each of the other conjugates. Gc: conjugated via glutaraldehyde.

Compound	Cross-reactivity ratio
L. Methionine-Gc	1
Homocysteine-Gc	1/>1,000
Homocysteic acid-Gc	1/>10,000
Cystathionine-Gc	1/>10,000
L. Cysteine-Gc	1/>10,000
L. Glutamate-Gc	1/>10,000