TCF mutant
    2.
    发明授权
    TCF mutant 失效
    TCF突变体

    公开(公告)号:US06399744B1

    公开(公告)日:2002-06-04

    申请号:US08700519

    申请日:1996-08-26

    IPC分类号: C07K1400

    CPC分类号: C07K14/4753 A61K38/00

    摘要: The present invention relates to a TCF mutant having a novel amino acid sequence which is obtained by mutagenesis of one or more amino acid between N-terminus and the first kringle of the amino acid sequence of native TCF and has lowered affinity to heparin and/or elevated biological activity. The present TCF mutant is prepared by gene manipulation of TCF. The TCF mutants of the present invention have proliferative activity and/or growth stimulative activity in hepatocyte and beneficial as a therapeutic agent for various hepatic diseases and an antitumor agent.

    摘要翻译: 本发明涉及具有新氨基酸序列的TCF突变体,其通过在天然TCF的氨基酸序列的N末端与第一个三环体之间的一个或多个氨基酸的诱变获得,并且具有降低的对肝素和/或 升高的生物活性。 本发明的TCF突变体通过TCF的基因操作来制备。 本发明的TCF突变体在肝细胞中具有增殖活性和/或生长刺激活性,并且作为各种肝脏疾病和抗肿瘤剂的治疗剂是有益的。

    Cell culture tank
    9.
    发明授权
    Cell culture tank 失效
    细胞培养槽

    公开(公告)号:US4904601A

    公开(公告)日:1990-02-27

    申请号:US309567

    申请日:1989-02-13

    IPC分类号: C12M1/06 C12M1/09 C12M3/02

    CPC分类号: C12M29/04 C12M25/16 C12M27/02

    摘要: Here is disclosed a cell culture tank comprising a cylindrical screen mounted upright within the cell culture tank and having upper and lower openings through which culture medium flows, a pipe for supply of oxygen or oxygen containing gas and an agitator adapted to produce a flow of the culture medium, both the pipe and the agitator being provided within the cylindrical screen, wherein the agitator drives the culture medium to flow downward through the lower opening of the cylindrical screen, then to flow upward into a space defined between the cylindrical screen and the inner wall of the cell culture tank, and a relationship between an ascending velocity of the culture medium and a sinking velocity of the adherent carriers produces in the space between the cylindrical screen and the inner wall of the cell culture tank a floating region within which the adherent carriers float in the culture medium and a separating region within which the adherent carriers are separated from the culture medium.