Abstract
Micropatterning of protein is a powerful technology to control the spatial organization of cells and their biochemical microenvironment. We have developed PRIMO: a contactless and maskless UV projection system to facilitate micropatterning experiments. However, a major drawback until recently was the long illumination time that prevented from using PRIMO for high content screening experiments and cell-based assays. Here we present a new photo-initiator (PLPP Gel) and protocol allowing fast micropatterning of protein inside standard 96 well plates.