然而，代之以随机的填满每一个斑点，包含了一定排序的基因促使其成为四螺旋结构。
Yet, instead of randomly filling each spot, the genes included sequences prompting them fold into four-helix structures (right).
如果基因是激活的，样本中的RNA就会与相应的基因片段结合在一起，再利用紫外光观察，那些激活的基因就成为一个个被染色的斑点。
If a gene is active, the RNA in the sample binds to the complementary gene fragment on the slide, and can be detected under ultraviolet light as a coloured dot.
作为一种检测，研究人员在一些繁殖茂盛的斑点处对DNA测序(支原体基因组这种东西现代测序技术可以在早晨喝完咖啡前搞定)。
As a check, the researchers sequenced the DNA from some of the flourishing spots (a Mycoplasma genome is the sort of thing a modern sequencing set-up can knock off before its morning coffee).
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