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    • 2. 发明授权
    • Purification of a polypeptide compound having a polysaccharide binding domain by affinity phase separation
    • 通过亲和相分离纯化具有多糖结合结构域的多肽化合物
    • US06174700B1
    • 2001-01-16
    • US08505860
    • 1995-07-24
    • Charles A. HaynesPeter TommeDouglas G. Kilburn
    • Charles A. HaynesPeter TommeDouglas G. Kilburn
    • C12P2106
    • A61K39/39C07K1/14C07K14/55C07K2319/00C08B15/00C08B37/003C08H8/00C12N9/16C12N9/2437C12N9/2445C12N11/12C12P19/02C12Q1/56C12Y302/01004C12Y302/01021D21H17/005G01N33/531G01N2333/924G01N2400/26Y10S435/803Y10S435/815Y10S530/813Y10S530/814
    • A compound having a polysaccharide binding domain such as contained by a cellulose and essentially lacking in polysaccharidase activity is purified from other ingredients in a mixture using an affinity partition system. A mixture containing the compound is contacted with a system containing as a first phase an aqueous solution of oligosaccharide polymer such as cellulose and as a second phase a solution of a polymer such as a poly(ethylene glycol)-poly(propylene glycol) copolymer. The compound petitions into the first phase and binds to the oligosaccharide polymer, preferably with a Ka of 103 to 107, to form a complex. The complex is collected, and the compound is dissociated from the oligosaccharide polymer. The compound may be formed of a non-peptide chemical moiety or a peptide moiety linked to a polypeptide having the polysaccharide binding domain. The compound may also be a fusion polypeptide containing the polysaccharide binding domain linked through a protease recognition sequence to a macromolecule such as an enzyme, a hormone or an antibody. The macromolecule can be removed by using a protease to cleave the recognition sequence. Another partition system contains the oligosaccharide polymer and a phase separation inducing agent such as a sulfate or citrate salt that induces separation to produce different phases.
    • 具有多糖结合结构域的化合物,例如由纤维素包含并且基本上不含多糖酶活性的化合物,使用亲和分配系统从混合物中的其它成分中纯化。 将含有化合物的混合物与含有第一相的系统接触,例如纤维素等低聚糖聚合物的水溶液,作为第二相与聚(乙二醇) - 聚(丙二醇)共聚物等聚合物的溶液接触。 化合物进入第一阶段并结合寡糖聚合物,优选用103至107的Ka形成络合物。 收集该络合物,并且该化合物与寡糖聚合物解离。 化合物可以由非肽化学部分或与具有多糖结合结构域的多肽连接的肽部分形成。 化合物还可以是含有通过蛋白酶识别序列连接到大分子如酶,激素或抗体的多糖结合结构域的融合多肽。 可以通过使用蛋白酶切割识别序列来除去大分子。 另一分隔系统含有寡糖聚合物和相分离诱导剂如硫酸盐或柠檬酸盐,其诱导分离以产生不同相。
    • 8. 发明授权
    • Acoustic filter for separating and recycling suspended particles
    • 用于分离和回收悬浮颗粒的声学过滤器
    • US5626767A
    • 1997-05-06
    • US88547
    • 1993-07-02
    • Felix TramplerJames M. PiretStefan A. SonderhoffDouglas G. Kilburn
    • Felix TramplerJames M. PiretStefan A. SonderhoffDouglas G. Kilburn
    • B01D21/00B01D43/00B01J19/10G10K11/04C02F1/36
    • B01D21/283B01D43/00B01J19/10G10K11/04
    • Particulate material suspended in a fluid is separated and recycled by means of an ultrasonic resonance wave. In a preferred embodiment, the ultrasonic resonance field is generated within a multilayered composite resonator system including a transducer, the suspension and a mirror parallel to each other. Dimensions and frequencies resonant to the whole system but not exciting Eigen-frequencies of transducer and mirror itself are chosen so that thermal dissipation is minimized. Criteria for flow direction and flow rate are defined in order to maintain a high-quality factor of the composite resonator and to achieve a high-separation efficiency. Generally, the process is suitable for all kinds of particles (solid, liquid or gaseous disperse phases) especially for hydrosols (particles in water) and for separation of biological particles such as mammalian, bacterial and plant cells or aggregates. Specialized applications in biotechnology are described including an acoustic filter for mammalian cell bioreactors or the selective retention of viable cells relative to non-viable cells.
    • 悬浮在流体中的颗粒物质通过超声共振波被分离和循环。 在优选实施例中,在包括换能器,悬架和彼此平行的反射镜的多层复合谐振器系统内产生超声共振场。 尺寸和频率与整个系统共振但不激励选择换能器和反射镜本征频率,以使散热最小化。 定义了流动方向和流速的标准,以保持复合谐振器的高品质因子并实现高分离效率。 通常,该方法适用于各种颗粒(固体,液体或气体分散相),特别是用于水溶胶(水中的颗粒)和分离生物颗粒如哺乳动物,细菌和植物细胞或聚集体。 描述了生物技术中的专门应用,包括用于哺乳动物细胞生物反应器的声学过滤器或相对于非活细胞选择性保留活细胞。