2. Protein microarray
A protein microarray (protein chip)is a high
throughput method used to track the interactions
& activities of proteins,& to determine their
functions,& determining function on a large scale.
Protein microarrays,are miniaturised and parallel
assay systems that contain small amounts of
purified proteins in a high density format.
3. Types of Protein Microarrays
Protein
Microarrays
Analytical
Protein
Microarray
Functional
Protein
Microarray
Reverse
Phase protein
Microarray
4. Analytical microarrays(or antibody microarrays)
have antibodies arrays on solid surface,and are
used to detect proteins in biological samples.
Often a second is used to detect a protein that is
captured by the antibody attached to the solid
phase,in a principle similar to that of sandwich
immunoassay, in which the first antibody is spotted
on the array and then a captured antigen on the
chip is detected with a second antibody that
recognises a different part of antigen.
Analytical Protein Microarray
6. Text
Functional Protein Microarray
Functional protein microarrays have recently been applied
to many aspects of discovery based biology,including
protein-protein,protein-lipid,protein-DNA,protein
drug,&protein–peptide iinteractions.
These can be used to identify enzyme substrates.
These can also be used to detect antibodies in a biological
specimen to profile an immune response.
8. Reverse Phase Protein Microarray
In RPA, cellular or tissue lysates are immobilized on the slides.
RPAs allow for the determination of the presence of altered
proteins or other agents that may be the result of disease.
Specifically, post translation modifications,which are typically
altered as a result of disease can be detected using RPAs.
9. Applicaton
There are five major areas where protein arrays
are being applied-
• diagnostics.
• proteomics.
• protein functional analysis.
• antibody characterisation & treatment.