The researchers took their inspiration from Magnetospirillum magneticum, a bacterium that is sensitive to the Earths magnetic field thanks to the presence within its cells of flecks of magnetite, a form of iron oxide.
研究人员从趋磁细菌上获得了灵感,由于该细菌内部存在磁性颗粒,所以对地球磁场非常敏感。
Previous work has isolated the protein that makes these miniature compasses. Using genetic engineering, the team managed to persuade a different bacteriumEscherichia coli, a ubiquitous critter that is a workhorse of biotechnologyto manufacture this protein in bulk.
他们先要把制造这种微型罗盘的蛋白质分离出来,并采用基因工程技术设法让另一种细菌大肠杆菌来批量生产这种蛋白质,而大肠杆菌在生物体内普遍存在,是生物工程中的常用苦力。
Next, they imprinted a block of gold with a microscopic chessboard pattern of chemicals.
然后他们用化学方法绘制微小的棋盘图案,
Half the squares contained anchoring points for the protein.
并把图案的每一块染成金黄色,
The other half were left untreated as controls.
每块区域的一半用该蛋白质做固定点,
They then dipped the gold into a solution containing the protein, allowing it to bind to the treated squares, and dunked the whole lot into a heated solution of iron salts.
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