Chemicals for use in the manufacture of microarrays; polynucleotides; proteins and polypepetides; nucleotide and peptide arrays; nucleic acid or DNA molecules on slides or membranes for comparing expression levels of two or more biological samples; biochemical sensors; optical array sensors for identifying nucleic acids and proteins; optical array sensor reagents; analytical and diagnostic test reagents for use in molecular biology research and life sciences, in particular for the screening o...