Designed specifically for quantitative solid-phase assays. The MaxiSorp surface has a guaranteed affinity for proteins based on antibody adsorption. PolySorp is less polar and may be used for more hydrophobic proteins. Frames and modules are designed for a one-way fit compatible with 96-well automation. Wells are round, flat-bottom or C-bottom and will not come loose when inverted. The C-bottom wells combine the readability of a flat bottom well with the washing ease of a round bottom well. FluoroNunc modules and frames are ideal for fluorescence assays.