Apparently the cobra ( and the mongoose ) has its acetyl choline receptors at the neuromuscular junction " shielded " from the effect of the neurotoxin, by a genetically determined sugar complex overlying the binding sites.
2.
A better option is the assessment of " Acetyl choline Esteras " e form amniotic fluid . Today, detection rate is 98 % at the time of an anatomical screen ultrasound at 20 weeks of gestation.
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