Further , CSTX - 2b also lacks arginine at position 61 compared to CSTX - 1 , and this reduces the neurotoxicty by 190-fold .
This makes CSTX - 2a seven times less toxic than CSTX - 1 .
CSTX - 2b also lacks arginine at position 61 compared to CSTX - 1 , and this reduces the neurotoxicty by 190-fold .
This makes CSTX - 2a seven times less toxic than CSTX - 1 .