会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Polynucleotides encoding .alpha.2-3 neuraminidase
    • 编码α2-3神经氨酸酶的多核苷酸
    • US5591839A
    • 1997-01-07
    • US294477
    • 1994-08-18
    • Harvey I. MillerJohn C. KlockChristopher M. Starr
    • Harvey I. MillerJohn C. KlockChristopher M. Starr
    • C12N9/24C07H21/02C07H21/04
    • C12Y302/01018C12N9/2402
    • Polynucleotide sequences encoding enzymes that possess .alpha.2-3 neuraminidase activity are provided. Of particular interest are polynucleotide sequences encoding an enzyme having .alpha.2-3 neuraminidase activity and naturally produced by the bacteria Streptococcus pneumoniae. Recombinant DNA expression of enzymes possessing .alpha.2-3 specific neuraminidase activity is also described, including methods, recombinant host cells and a genetic construction. The invention also provides a purified enzyme having .alpha.2-3 neuraminidase activity from Streptococcus pneumoniae, wherein the enzyme is isolated from S. pneumoniea cultures. Another aspect of this invention is to provide methods of isolating genes encoding enzymes having neuraminidase activity, particularly .alpha.2-3 neuraminidase activity. The gene isolation methods of the invention comprise the step of labeling a hybridization probe derived from the neuraminidase coding portion of plasmid pND-1. The hybridization probe may then be used to isolate homologous genes encoding enzymes having the desired enzymatic activity.
    • 提供了编码具有α2-3神经氨酸酶活性的酶的多核苷酸序列。 特别感兴趣的是编码具有α2-3神经氨酸酶活性并由细菌肺炎链球菌天然产生的酶的多核苷酸序列。 还描述了具有α2-3特异性神经氨酸酶活性的酶的重组DNA表达,包括方法,重组宿主细胞和遗传构建。 本发明还提供了具有来自肺炎链球菌的α2-3神经氨酸酶活性的纯化酶,其中所述酶从肺炎链球菌培养物中分离。 本发明的另一方面是提供分离编码具有神经氨酸酶活性的酶的基因,特别是α2-3神经氨酸酶活性的方法。 本发明的基因分离方法包括标记衍生自质粒pND-1的神经氨酸酶编码部分的杂交探针的步骤。 然后可以使用杂交探针来分离编码具有所需酶活性的酶的同源基因。
    • 8. 发明授权
    • Charge-coupled device imaging apparatus
    • 电荷耦合器件成像装置
    • US5672881A
    • 1997-09-30
    • US612195
    • 1996-03-06
    • Steven K. StriepekePeter EdridgeChristopher M. StarrJohn C. Klock
    • Steven K. StriepekePeter EdridgeChristopher M. StarrJohn C. Klock
    • G01N21/64
    • G01N21/6456
    • An apparatus for fluorescence of a biological sample includes a light illumination source, an ambient light-excluding optical chamber, a sample holder, a two-dimensional array charge coupled device ("CCD") sensor providing for on-chip signal integration of each pixel of the array, and an analog/digital converter for digitizing the CCD signal. Signal acquisition time from the array is varied so that the integrated signal from each pixel is below its saturation level. A darkfield value for each pixel is acquired and subtracted from the illuminated signal from that pixel so as to yield a darkfield corrected signal. The fluorescence value for each pixel can be compensated for variations in excitation energy reaching different sample areas. Image readout is through a single channel output.
    • 用于生物样品的荧光的装置包括光照射源,环境光排除光学室,样品架,二维阵列电荷耦合器件(“CCD”)传感器,用于提供每个像素的片上信号积分 的阵列,以及用于数字化CCD信号的模拟/数字转换器。 来自阵列的信号采集时间是变化的,使得来自每个像素的积分信号低于其饱和水平。 获取每个像素的暗场值,并从该像素的照明信号中减去暗场值,以产生暗场校正信号。 每个像素的荧光值可以补偿到不同样品区域的激发能量的变化。 图像读出是通过单通道输出。