Abstract: A one-piece field-pole magnet is manufactured by filling a gap formed between magnetic pieces placed on a plane with an adhesive or resin. During the process, a pushing member applies a pushing force onto each of the magnet pieces in a thickness direction thereof. The pushing member comprises pushing parts each of which pushes each of the magnet pieces, thereby equalizing the pushing forces applied to the respective magnet pieces.

Abstract: The purpose of the present invention is: to provide an excellent protein which is further reduced in the binding property to an Fc region of an immunoglobulin and/or the binding property to an Fab region of the immunoglobulin in a weakly acidic region compared with that of a protein containing an extracellular domain of wild-type protein G, and which still keeps a high antibody-binding activity in a neutral region; and to capture and collect an antibody readily using the protein without denaturating the antibody.