The present invention describes an approach to cancer therapy utilizing novel VEGF receptor antagonists. If the V coordinate of texture data to be written is an even number, the texture data is written in the first, second, third and fourth texture memories 1a, 1b, 1c and 1d in this order. The at least one microcantilever beam can include a silicon base layer and a gold-coated receptor layer with a plurality of thiol molecules having a sulfur head and carboxyl-terminated group.