Product Specifications:
Item# 30170: Recombinant Dengue Antigen D2 Envelope Protein (Baculo)
Concentration: See vial
Mass/vial : See vial
Diluent : 50mM Tris, pH8, 10mM NaCl SDS Trace
Purity : >95%
Stabilizer : None
Preservative: None
Storage: -750C
Physical State:Frozen Liquid
Stability: 2years at -750C.
Applications: Elisa/Western Elisa, Diagnostics
Description: Synthetic Dengue virus D2 Envelope DNA sequence, amino acid residues 1-428, expressed in the Baculo Expression System.
Purification: This protein is purified by aqueous solvent extraction and preparative electrophoresis to >95% purity as determined by SDS-PAGE, reduced.
Molecular Weight: approx. 49kD.
Specificity: This protein shows strong reactivity with Dengue virus converted human antibodies as determined by Elisa, Western Blots assays. Useful for Dengue serum IgG/IgM detection.
Application and Instructions for use
Recommended concentrations for use are approximate values. Elisa is performed in 1-2ug/ml protein range for tittering Dengue virus converted human polyclonal antibodies. Concentrations if 1-2mg/ml (1-2ul/cm) are recommended for Lateral Flow Diagnostics.
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所以一个细菌或病毒可以有很多的抗原。
若已进入细胞内。则先由巨噬细胞吞噬降解。并形成抗原-MHC复合体传送到表面。被辅助性T淋巴细胞识别和效应T淋巴细胞识别后。效应T淋巴细胞被激活。分解靶细胞。然后再由效应B细胞分泌的抗体进一步消灭病毒。
还有不清楚的么？
荚膜（capsule）是某些细菌在生长繁殖过程中分泌的一层黏液性物质，包围在细胞壁外，通常这种黏液层厚度小于0.2μm，成分是多糖或多肽，只有在营养丰富时或在动物体内，细菌才产生这种半抗原性质的黏液性物质。它具有保护菌体免受巨噬细胞等的捕捉和吞噬，因而具有抗吞噬抗消化、侵袭力强、与致病性关系密切等特点。像肺炎球菌、炭疽杆菌等都有这类荚膜。有些细菌的荚膜层较薄，小于0.2μm，称为微荚。
像链球菌的M蛋白、伤寒杆菌的Vi抗原、大肠杆菌的K抗原等都属于这类微荚膜。
请赐教！
