Figure 4.

Spotted cell microarray technology. (a) DNA is mixed with gelatin and spotted as a high-density array on a glass slide, and it is dried and stored until needed for an experiment. (b) To perform an experiment, the array is rehydrated, and cells are seeded uniformly across the array. (c) Cells attach and spread across the array, and (d) those cells residing above DNA spots take up the underlying nucleotides and become transfected in a spatially localized fashion (42).