Abstract: The present invention provides apparatuses for measuring cell membrane resistance, conductance, potential, and capacitance, which can be used to determine cellular electrical activity. More specifically, the present invention provides automated apparatuses that are designed for high-throughput analysis of various compounds, ligands, and cell processes that modulate cellular electrical properties (e.g., cell membrane conditions). Such automated apparatuses can be used for the precise determination of ion channel activity, and for the rapid identification of compounds, ligands, or processes that alter this activity. The present invention also provides methods for measuring cellular electrical properties utilizing the apparatuses provided herein.

Abstract: The invention provides exemplary systems, methods, and apparatus for distinctly allocating liquids containing chemical compositions or compounds to known locations in an organized manner so that assays may be performed on the compositions, or so that the chemical compositions may be combined with other distinct chemical compositions or reagents prior to evaluation. In an exemplary embodiment, the invention includes a multiwell plate for handling articles such as resin beads suspended in a liquid. The plate comprises a plurality of wells. The wells in turn have a capillary hole that is adapted to (i) retain articles in the well, and (ii) retain liquid in the well while the liquid is not subjected to extrinsic forces, such as centrifugation or vacuum.

Abstract: The invention provides exemplary systems, methods, and apparatus for distinctly allocating liquids containing chemical compositions or compounds to known locations in an organized manner so that assays may be performed on the compositions, or so that the chemical compositions may be combined with other distinct chemical compositions or reagents prior to evaluation. In one exemplary embodiment, the invention provides a fluid transfer system which comprises a donor member having a plurality of separate regions. At least some of the regions contain at least one chemical composition, with each chemical composition being distinct from any other chemical composition in the donor member. An acceptor member is also provided and includes a plurality of defined locations which are each adapted to receive a liquid medium.