Motoo Yamasaki

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An anti-human interleukin 5 receptor (hIL-5R) humanized immunoglobulin G1 (IgG1) and an anti-CD20 chimeric IgG1 produced by rat hybridoma YB2/0 cell lines showed more than 50-fold higher antibody-dependent cellular cytotoxicity (ADCC) using purified human peripheral blood mononuclear cells as effector than those produced by Chinese hamster ovary (CHO) cell(More)
To improve the efficiency of sterilization by high hydrostatic pressure treatment (HPT), it is desirable to know the biochemical process of bacteria most sensitive to the treatment. We investigated growth properties after release from HPT of exponentially growing Escherichia coli K-12 cells. We observed growth retardation after treatment (30 min at 37°C)(More)
A new cleavage site, which is a post-translational modification, was found between residues His-154 and Ala-155 in alpha A-crystallin from the aged human lens. After trypsin digestion of alpha A-crystallin two peptides that include Asp-151 were obtained and have remarkable differences. That is, the stereo-configuration of the Asp-151 in the normal length(More)
Acid carboxypeptidase (peptidyl-L-amino-acid hydrolase, EC 3.4.16.1) was purified to a homogeneous state from the water extracts of Koji cultures of Aspergillus niger var. macrosporus. The molecular weight of the enzyme was determined to e 136 000 by sedimentation equilibrium method. The denatured specimen of the enzyme exhibited a molecular weight of 60(More)
It has been demonstrated that the phospholipase C-gamma (PLC-gamma) molecule contains within it a phospholipase C inhibitor (PCI) region and that synthetic peptides based on the sequence of this region (PCI peptides) suppress the enzymatic activity of PLC isoforms [Y. Homma and T. Takenawa (1992) J. Biol. Chem. 267, 21884-21889]. In order to improve the(More)
Peptide hormones and neuropeptides constitute an important class of naturally occurring peptides that are generated from precursor proteins by limited proteolytic processing. An important but unaddressed issue in peptidomics is to pin down novel bioactive peptides in a bulk of peptide sequences provided by tandem mass spectrometry. Here, we describe an(More)
Subtilisin from a wide variety of Bacillus species has been extensively investigated as a promising target for protein engineering. In this study, we analyzed the substrate specificity of B. subtilis subtilisin E based on the structure of a new alkaline elastase produced by the alkalophilic Bacillus strain Ya-B, which has very high elastolytic activity.(More)
Fibroblast growth factor (FGF) 8, also known as androgen-induced growth factor, was originally isolated from an androgen-dependent mouse mammary Shionogi carcinoma SC-3 cell line, in which it was shown to have androgen-regulated properties. We previously demonstrated that Fgf 8 transcripts were detected in several human prostate and breast cancer cell lines(More)
The Rh blood group antigens are carried by two distinct but homologous membrane proteins encoded by two closely related genes, RCHE and RHD. Rh50 glyco-protein is the membrane protein tightly associated with Rh polypeptides and is critical for expression of Rh antigens. The amino acid sequence and predicted membrane topology of Rh50 glycoprotein are(More)