Apertured cell carrier

Apparatus for holding living cells at identifiable locations comprising an apertured cell carrier having a configuration defining first and second outer surfaces, said carrier comprising an ordered array of holes therethrough, the positions on the carrier of the holes being identifiable and the holes being sized to have the ability to contain individual living cells having a generally spherical shape therewithin, one cell only per hole, in that the holes have (i) a first cross section at the first outer surface of the carrier of such dimensions that living cells can pass through the first cross section without suffering substantial damage, (ii) a second cross section at a level intermediate between said first and second outer surfaces and of such dimensions that said living cells cannot pass through the second cross section, and (iii) a height between the first outer surface and the level of the second cross section such that either such an entire living cell or substantially such an entire living cell is containable within the hole;

• said apparatus being in cooperative combination with means for producing force acting on cells when these are present in individual holes on the carrier, wherein said means for producing force comprises electromagnetic means arranged for the production of at least one field selected from electric and magnetic fields in a predetermined pattern with respect to the holes.

Apparatus for holding living cells at identifiable locations comprising an apertured cell carrier having a configuration defining first and second outer surfaces, said carrier comprising an ordered array of holes therethrough, the positions on the carrier of the holes being identifiable and the holes being sized to have the ability to contain individual living cells having a generally spherical shape therewithin, one cell only per hole, in that the holes have (i) a first cross section at the first outer surface of the carrier of such dimensions that living cells can pass through the first cross section without suffering substantial damage, (ii) a second cross section at a level intermediate between said first and second outer surfaces and of such dimensions that said living cells cannot pass through the second cross section, and (iii) a height between the first outer surface and the level of the second cross section such that either such an entire living cell or substantially such an entire living cell is containable within the hole, and the carrier containing at least one entire living cell or at least one substantially entire living cell, held within at least one individual hole therein, one cell only per hole;

• and wherein said ordered array comprises at least one sub-group of uniformly shaped holes of such cross sectional dimensions that individual living cells of a particular identical size are held therewithin, one cell only per hole, and said at least one sub-group of uniformly shaped holes comprises a first sub-group of uniformly shaped holes and said carrier comprises additionally at least one other sub-group of uniformly shaped holes, wherein the cross sectional dimensions of said first sub-group are different from the cross sectional dimensions of said at least one other sub-group, whereby the holes in said first sub-group hold individual living cells of a preselected first size therewithin, one cell only per hole, and the holes in said at least one other sub-group hold individual living cells of at least one preselected other size therewithin, one cell only per hole, which cells are different from the cells of said preselected first size.