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    • 6. 发明授权
    • Cloning and characterization of napsin
    • napsin的克隆和表征
    • US06225103B1
    • 2001-05-01
    • US08974691
    • 1997-11-20
    • Gerald KeolschXinli LinJordan Tang
    • Gerald KeolschXinli LinJordan Tang
    • A61K3857
    • C12N9/6478
    • A previously unknown aspartic protease capable of cleavage of proteins by hydrolysis, referred to herein as “napsin”, has been cloned from a human liver library. Two cDNA clones have been cloned, sequenced and expressed. These encode isozymes of the protease, referred to as “napsin A” and “napsin B”. The gene has also be obtained and partially sequenced. A process for rapid purification of the enzyme using immobilized petpstatin has also been developed, and enzyme isolated from human kidney tissue. Polyclonal antibodies to the enzymes have been made which are also useful for isolation and detection of the enzyme. Similarities to other aspartic proteases, especially cathepsin D, establish the usefulness of the enzyme in diagnostic assays as well as as a protease. Either or both the amount or type of napsin expressed in a particular tissue can be determined using labelled antibodies or nucleotide probes to the napsin.
    • 已经从人肝脏文库克隆了能够通过水解裂解蛋白质的以前未知的天冬氨酸蛋白酶,这里称为“重叠蛋白酶”(Napsin))。 已经克隆,测序和表达了两个cDNA克隆。 这些编码蛋白酶的同功酶,称为“napsin A”和“napsin B”。 该基因也可获得并部分测序。 还开发了使用固定的petpstatin快速纯化酶的方法,并从人肾组织中分离酶。 已经制备了对酶的多克隆抗体,其也可用于分离和检测酶。 与其他天冬氨酸蛋白酶,特别是组织蛋白酶D的相似性确定了酶在诊断测定中的用途以及作为蛋白酶。 在特定组织中表达的napsin的量或类型中的任一个或两者可以使用标记的抗体或对napsin的核苷酸探针来确定。