Killer feast

 作者:融樊影     |      日期:2019-03-06 04:02:07
INSECT pests that gorge on a modified strain of maize could die of malnutrition. John Howard and his colleagues at ProdiGene, a company based in College Station, Texas, spliced the gene for avidin, a glycoprotein found in chicken egg whites, into the maize. The protein attaches itself to the vitamin biotin so insects that feast on growing crops or stored grain eventually die from vitamin deficiency (Nature Biotechnology, vol 18, p 670). The avidin maize did not harm mice fed nothing else for 21 days,