Abstract Background Many plants contain phytotoxic alkaloids to deter herbivorous pests and grazing animals. Alkaloids include quinolizidine indole found in the lupin ( Lupinus spp.), an ornamental flower emerging protein crop, as well pyrrolizidine ragwort Senecio jacobaea ), invasive, weed-like flower. When lupins ragworts are present large densities fields, there is a concern that may leach ...

2. The nunmber of reactive SH groups/molecule in the haemoglobins studied approximate either to 2 or to 4. 3. The behaviour of the reactive SH groups differs from that of cysteine in three ways: (a) the rate of reaction of heavy-metal ions with the reactive SH groups is slower than with cysteine; (b) thiosulphate interferes with the reaction between Ag+ ions and the reactive SH groups of human ...

Pyrrolizidine alkaloids are naturally occurring secondary plant metabolites mainly found in families of Asteraceae, Boraginaceae, and Fabaceae. Chemically, Pas consist a pyrrolizidine core bearing hydroxyl groups, the so-called necine base, mono- or dicarboxylic acids bound to via ester linkages. 1,2-unsaturated PAs hepatotoxic, genotoxic, carcinogenic due highly reactive pyrrolic formed by cyt...