An assembly as well as systems and methods for performing parallel crystallisation experiments are known from WO 02/06802. The known assembly comprises a microplate having multiple microwells having an opening at the top. Sealing of the wells is effected by O-ring seals around the top of each well, which are interpositioned between the microplate and a cover plate.
The known assembly is not sufficiently practical when conducting parallel experiments in high volumes, known as high throughput experimentation. In particular the known assembly is unsatisfactory when conducting parallel crystallisation experiments.