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Haematologic Technologies/Human Osteonectin (SPARC) - Haematologic Technologies, Inc./BON-3010/BON-3010-50 µg
产品编号:BON-3010-50µg
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美  元  价:$213.00
品      牌: haemtech
公      司:Haematologic Technologies Inc.
公司分类:
Haematologic Technologies/Human Osteonectin (SPARC) - Haematologic Technologies, Inc./BON-3010/BON-3010-50 µg
商品介绍

Osteonectin is an acidic, noncollagenous glycoprotein (Mr=29,000) originally isolated from fetal and adult bovine bone matrix (1-5). In vitro bovine bone osteonectin binds type I collagen, calcium (Kd=3x10-7 M) and hydroxyapatite (Kd=8x10-8 M) and has been shown to be a potent inhibitor of hydroxyapatite seeded crystal growth (6). In this context it has been suggested that osteonectin may play an important role in the regulation of bone metabolism by binding hydroxyapatite to collagen. Recently, proteins homologous to osteonectin have been identified in a number of cell types, most of which are associated with extracellular matrix production (7). The amino acid sequence (from cDNA sequences) of one of these proteins, human placental SPARC is identical to human bone osteonectin.

Osteonectin has also been identified as an alpha granule component of human platelets and is secreted during activation. A small portion of the secreted osteonectin is expressed on the platelet cell surface in an activation dependent manner (8). Purified platelet osteonectin is a single chain molecule which exhibits a slightly larger apparent molecular weight than that of osteonectin derived from bone (8). The NH2-terminal sequences of platelet and bone-derived osteonectin are identical, but the two proteins differ with regard to the extent ot glycosylation (8-10).

Human platelet osteonectin is isolated from thrombin activated platelets as described by Kelm, et al. (8). Bovine bone osteonectin is isolated from demineralized bone by the method of Romberg et al. (2). Both proteins are supplied in 0.02 M Tris, 0.15 M NaCl, pH 7.4, and should be stored at -80oC. Purity is judged by SDS-PAGE analysis.

品牌介绍

Haemtech生物制药服务(HBS)是一家领先的,符合cGMP要求的QC测试实验室,专门为生产重组和血浆衍生蛋白疗法的生物制药制造商提供分析服务,重点是那些会影响止血系统的药物。HBS使客户能够满足法规和质量测试要求,从而将其候选药物从开发转向商业化。

对生物制药的需求正在增长,并且该行业正在迅速采用外包策略,以作为满足不断升级的监管要求的一种方式。凭借在止血方面的丰富经验,HBS能够很好地协助开发影响凝血系统的药物产品。


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