Patent ID: 7022516

Claim:
A well unit to be used in an apparatus for detecting chemotaxis of cells and separating cells comprising: (1) a plural number of wells, in which a liquid sample can be held in a resting state, are connected to each other via a channel, (2) wherein the channel is provided with a bank having a terrace on the upper part of the bank, (3) wherein the wells are formed so as to tightly bond to a glass substrate, (4) wherein on the terrace on the upper part of the bank, barriers constituting one or more grooves having a width and/or depth fit for the diameter or deformability of cells are provided or the terrace on the bank is provided so as to give a gap fit for the diameter or deformability of cells between the terrace and the glass substrate and (5) wherein said plural number of wells are connected to a single well each via a separate channel.