Importance

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Abstract

There is provided a compound centrifuge tube including a larger volume bottomless portion, and a smaller volume portion having a bottom and formed just below the larger volume portion. The smaller volume portion is designed to be separable from the larger volume portion, for instance, by forming an annular groove at an outer surface of the tube so that a boundary between the larger and smaller portions has a smaller wall-thickness than other portions. For another instance, there may be formed threaded portions both at a lower end of the larger volume portion and at an upper end of the smaller volume portion so as to detachably engage those two portions to each other. In accordance with the compound centrifuge tube, a cell pellet remain unremoved at a distal end of the smaller volume portion even after centrifugation and washing. Thus, it is no longer necessary to transfer the cell pellet into a micro-tube with a pipette unlike a conventional centrifugal separation tube where it is necessary to transfer a cell pellet to a micro-tube from the tube after centrifugation/washing.

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First Claim