Abstract: It is intended to provide a method for efficiently and stably producing a heteromultimer by incubating, under a reducing condition, homo variants of plural types of polypeptides in which the alteration of amino acids that form the interface between Fc regions and/or the alteration to destabilize the stability of a heavy chain CH3 region has been introduced in the heavy chain CH3 regions so at to achieve the promotion of the dissociation of the Fc regions and/or the control of the association thereof through the use of charge repulsion.

Abstract: An originally developed efficient signal sequence trapping method was used to screen a cDNA library prepared from cultured mast cells derived from mouse bone marrow. As a result, genes encoding type I membrane proteins and comprising a single immunoglobulin domain in the extracellular domain and a motif for transmitting an inhibitory signal into cells were successfully isolated.

Abstract: A 44-bp region that confers vitamin D3-responsiveness to the human p27Kip1 promoter in the human p27Kip1 transcriptional regulatory mechanism was revealed. This region also conferred vitamin D3-responsiveness to a heterogenous promoter. Moreover, it was found that vitamin D3 enhances the binding between the CCAAT box existing in the region and the NF-Y protein and also the binding between the Sp1 sequence (also existing in the region) and the Sp1 protein, thus inducing human p27Kip1 transcription. Also revealed were methods of screening for pharmaceutical agents that regulate the expression of the p27Kip1 gene using these molecular mechanisms.

Abstract: Disclosed are an antibody against human para-thyroid-hormone-related protein, a DNA coding for the antibody, a recombinant vector containing the DNA, a transformant transformed with the recombinant vector, a method for preparation of the antibody, and uses of the antibody.