Cygnus technologies, Inc.是美国一家专门从事生物工程和制药过程中残留物检测的一系列产品。生物制品生产过程中存在许多影响产品质量的残留物，诸如特殊重组表达系统中宿主细胞蛋白（ Host Cell protein, HCP ）的残留以及生物制品加工过程中培养物残留的污染物。公司提供了广泛而灵敏度*的一系列用于检测生物工程残留物的产品，

Protein A的检测试剂盒

针对开发抗体药，检测纯化过程中残留的Protein A，也有其他相关应用，分为三款F050、F050H和F400，其中F400是产品，是灵敏度zui高、效果的检测Protein A的试剂盒。

1）三个试剂盒的组成

2）三个试剂盒的差别

Protein A ELISA kit

This ELISA incorporates some improvements over the earlier kits and is designed to better detect the newer, unnatural constructs of Protein A such as the MabSelect SuRe^TM ligand sold by GE Healthcare. If you are using a recombinant form of Protein A with very significant structural differences from natural Protein A such as MabSelect SuReTM you should use the Catalog #F400 kit. If you are evaluating our Protein A assays for the first time, we recommend using this kit, since it offers other robustness and procedural advantages over the older kits. The LOD is ~50pg/mL

We have improved the sample treatment procedure which reduces tedious pipetting while increasing throughput of the sample processing step. Validation of the new method shows excellent precision with improved overall robustness of the assay. This new method has demonstrated superior spike and recovery in problematic sample matrices and also overcomes 'front-to-back' drift reported by some labs. Labs equipped with microplate adaptable centrifuges can now process up to 96 tests simultaneously. Instead of using individual microfuge tubes, the new method uses a 96 well "PCR" Sample Treatment Plate and an adhesive seal, included in the kit. This procedure also minimizes problems of inadvertent disruption of the pelletized denatured proteins when handling microfuge tubes.