Tag: Fluorescence detection

Sensitive Detection of Total Protein on RPPA using Fast Green

Reverse phase protein arrays (RPPA) are designed for sensitive quantitation of a target protein in a very small sample of tissue lysate, and multiplex analysis of many samples in one experiment. This technology holds great promise for the identification and analysis of critical biomarkers for disease states in patient samples and for high-throughput drug screening … Continued

Beating Background Fluorescence on Nitrocellulose Film-Slides

Near Infrared Detection with Porous Nitrocellulose Films Improves Sensitivity for Protein Arrays. Despite some clear performance advantages of porous nitrocellulose Film-Slides for protein arrays, one objection to their use is the inherent fluorescence background detected on most scanners when using popular organic dyes with visible emission wavelengths (500-650 nm). However, fluorescence detection in near infrared … Continued

Inclusion of Super G in All Steps of Protein Arrays Improves S/N

Blocking reagents are used to reduce non-specific protein binding in immunoassays, significantly improving results in terms of Signal-to-Noise ratio. Typically the blocking reagent is added prior to addition of the primary detection antibody.In this study we asked the question as to whether addition of the blocking reagent to other steps in a protein array assay … Continued

Super G: Super Blocking and Signal-to-Noise for ONCYTE Film Slides

Fluorescence detection is a preferred method for many quantitative protein microarray assays in research and diagnostic applications due to its excellent sensitivity and potential for multiplexing. Use of multiplexed fluorescence-based assays on porous nitrocellulose though has been hampered by high backgrounds at shorter excitation wavelengths (such as the 532 nm fluorescence channel).  To maximize the … Continued

Multiplex Protein Arrays with Quantum Dots

Multiplexed protein arrays offer significant advantages for diagnostics over monoplex assays such as ELISA’s. For multiplex detection, fluorescence is the label of choice, offering rapid and sensitive detection and large dynamic range in addition to the ability to separate signals from multiple fluors.While porous nitrocellulose (NC) film slides are an excellent substrate for protein arrays … Continued

Novel Microarray Applications For Nitrocellulose Films

Building on the well-established ability of nitrocellulose to bind macromolecules in gel transfer applications, Grace Bio-Labs invented a method to cast thin porous nitrocellulose films directly onto glass microscope slides.  These “Film-Slides” or “Films” were initially designed for a new platform for immunocytochemistry, called Cytocoherent Transfer (1, 2).  Since that time, Film-Slides have become an established surface … Continued