Microchips: Multistep reactions may be catalyzed by enzymes immobilized on microbeads trapped inside microfluidic channels. Large integrated microfluidic circuits can be created by using multilayer soft lithography in poly(dimethylsiloxane). These circuits (see schematic representation) can be used to perform hundreds of different reactions simultaneously, and can be applied to a range of problems, from enzymatic assays to crystallization of proteins.
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Rustem F. Ismagilov (2003) studied this question.