The Kernel Saxitoxin (PSP) ELISA Test Kit is a competitive enzyme immunoassay for the quantitative analysis of Saxitoxin in mussels and water samples. 

Saxitoxin, the principal component of paralytic shellfish poisons (PSP), blocks the sodium ion channels in nerve and muscle membranes. The lethal dose in humans is 1 to 3 mg. Numbness and respiratory paralysis can occur after oral ingestion of as little as 0.5 - 1.0 mg saxitoxin.