But first the researchers need to better understand how the signal factor itself is regulated in the cell.

但是研究者们首先必须更好的理解信号因子在细胞中是如何进行调控的。

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"The cell signal factor SCAI controls the formation and function of b1-integrin," says Dr. Robert Grosse. "If there is too little SCAI in tumor cells, then b1-integrin is overactive, so to speak."

Robert Grosse博士说：“细胞信号因子scai控制b1 -整联蛋白的形成和功能，可以说，如果肿瘤细胞中scai太少，b1 -整联蛋白就会表现得过度活跃。”

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The deciding factor lies in the nature of signal being transmitted.

决定因素在于传输的信号的性质。

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And in the current issue of Applied Physics Letters, a group led by Haroun Ahmed at the Hitachi Cambridge Laboratory in Britain reports another vital step, a single-electron transistor that, for the first time, amplifies its input signal (though only by a factor of 3.7, several hundred times more weakly than a conventional transistor does).

ECONOMIST: The transistor��s heir