ISSN: 2155-9872

Revista de técnicas analíticas y bioanalíticas

Acceso abierto

Nuestro grupo organiza más de 3000 Series de conferencias Eventos cada año en EE. UU., Europa y América. Asia con el apoyo de 1.000 sociedades científicas más y publica más de 700 Acceso abierto Revistas que contienen más de 50.000 personalidades eminentes, científicos de renombre como miembros del consejo editorial.

Revistas de acceso abierto que ganan más lectores y citas
700 revistas y 15 000 000 de lectores Cada revista obtiene más de 25 000 lectores

Indexado en
  • Índice de fuentes CAS (CASSI)
  • Índice Copérnico
  • Google Académico
  • sherpa romeo
  • Base de datos de revistas académicas
  • Abrir puerta J
  • Revista GenámicaBuscar
  • TOC de revistas
  • InvestigaciónBiblia
  • Infraestructura Nacional del Conocimiento de China (CNKI)
  • Directorio de publicaciones periódicas de Ulrich
  • Biblioteca de revistas electrónicas
  • Búsqueda de referencia
  • Directorio de indexación de revistas de investigación (DRJI)
  • Universidad Hamdard
  • EBSCO AZ
  • OCLC-WorldCat
  • director académico
  • Catálogo en línea SWB
  • Biblioteca Virtual de Biología (vifabio)
  • publones
  • Pub Europeo
  • ICMJE
Comparte esta página

Abstracto

Optimal Concentration of 2,2,2-Trichloroacetic Acid for Protein Precipitation Based on Response Surface Methodology

Albert N Ngo, Miezan JM Ezoulin, Ibrahima Youm and Bi-Botti C Youan

For low protein concentrations containing biological samples (in proteomics) and for non proteinaceous compound assays (in bioanalysis), there is a critical need for a simple, fast, and cost-effective protein enrichment or precipitation method. However, 2,2,2-trichloroacetic acid (TCA) is traditionally used for protein precipitation at ineffective concentrations for very low protein containing samples. It is hypothesized that response surface methodology, can be used to systematically identify the optimal TCA concentration for protein precipitation in a wider concentration range. To test this hypothesis, a central composite design is used to assess the effects of two factors (X1 = volume of aqueous solution of protein, and X2 = volume of TCA solution 6.1N) on the optical absorbance of the supernatant (Y1), and the percentage of protein precipitated (Y2). Using either bovine serum albumin (BSA) as a model protein or human urine (with 20 ppm protein content), 4% w/v (a saddle point) is the optimal concentration of the TCA solution for protein precipitation that is visualized by SDS-PAGE analysis. At this optimal concentration, the Y2-values range from 76.26 to 92.67% w/w for 0.016 to 2 mg/mL of BSA solution. It is also useful for protein enrichment and xenobiotic analysis in protein-free supernatant as applied to tenofovir (a model HIV microbicide). In these conditions, the limit of detection and limit of quantitation of tenofovir are respectively 0.0014 mg/mL and 0.0042 mg/mL. This optimal concentration of TCA provides optimal condition for protein purification and analysis of any xenobiotic compound like tenofovir.