An honest error has led to promising research into the development of species-specific insecticides.
The account is in the journal Nature Communications.
A team of Johns Hopkins scientists study sodium channels responsible for electrical signaling in nerve cells from humans and from cockroaches.
Spider venom protein messes with these sodium channels—that’s why venom is dangerous.
So the researchers use spider venom protein to disrupt the channels and thus clarify exactly how the channels function.
The researchers recently asked for venom protein samples from Australian collaborators.
And the Aussies accidentally included a spider venom protein that has no effect on humans or American cockroaches.
In their tests, the Hopkins researchers found when sodium channels from German cockroaches were exposed to the mistakenly included sample, their activity skyrocketed, enough to cause death-inducing seizures.
Intrigued that the American roach sodium channel laughed off the venom that would kill the German roach, the scientists found a key region on the two species'channels that differed by only two amino acids.
对美国蟑螂毫无影响力的毒液却可以杀死德国蟑螂 。研究人员于此发现关键这两个物种通道有两个不同的氨基酸 。
The scientists say the information could help with the creation of insecticides that target one harmful insect species without hurting beneficial ones, like bees.
As the study authors note: The more specific a toxin's target, the less dangerous it is for everything else."
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This can lead to significant distress, but have no fear!
I believe that his friends, above all Halifax, came to the conclusion that he must be rooted out of the life he was leading at Trinity which must soon lead to decay of mind and health.
2.responsible for 为…负责
He should be responsible for that.
Our background and circumstances may have influenced who we are, but we are responsible for who we become.
3.ask for 要求；寻找
I didn't ask for the chairmanship. I was pitched into it.
What we expressed to them is that we know they did not ask for this.
4.expose to 暴露于
He is exposed to the ridicule of the public.
to expose soldiers to gunfire.