Purification of protein by our highly specific aptamers

4th October 2019
Isolating a single target from a complex sample can be challenging and is often a multi step process which requires increased specificity for the target. Affinity separation is commonly used method as it involves the use of selective binding to purify proteins from a complex sample. Antibodies are commonly used as  capture probes […]

Purification of functional proteins facilitated by aptamer mediated affinity chromatography (AMAC)

19th September 2019
Purification of functional proteins is a key procedure in development and production of biologics and often relies on traditional ion exchange, hydrophobic interaction or size exclusion chromatography. Although these techniques are relatively gentle, obtaining the desired level of purity requires many sequential and sometimes repeated purification steps. Affinity separation is also frequently used […]

Aptamers to discriminate closely related proteins with post-translational modifications

6th August 2019

Proteins can undergo post-translational modifications (PTM) of their amino acids which can lead to a change in their activity and increase their functional repertoire. The most common of these modifications include phosphorylation, glycosylation, ubiquitination, citrullination, acetylation, methylation, and hydroxylation (Figure A). PTM on proteins can therefore serve as useful biomarkers for disease. However, their […]

Biomarker detection in serum becomes easier using aptamer based biosensor

30th July

Blood contains a range of protein biomarkers that could be used in the early detection of disease. One important biomarker is human epidermal growth factor receptor 2 (HER2) which is overexpressed in the most common breast cancer. Various HER2 detection techniques have been reported, including FISH or IHC based assays, however, these techniques require […]

Literature Review: Distinguishing glycosylation patterns in proteins for the early detection of cancer.

7th May 2019
Glycosylation is a post-translational modification where a carbohydrate is added to a protein. Glycosylation of proteins serves a number of functions in a cell, including: improve protein folding, forming lipid anchors and cell-to-cell adhesion. While glycosylation of a protein can be vital for its function, any changes in the position or number of […]

Literature Review: Glycan Specific Aptamers for Early Cancer Detection

9th April 2019
Changes in the glycosylation pattern of cell surface and secreted glycoproteins are common in malignant transformations and cancer progression, (1).  Prostate-specific antigen (PSA), is a glycoprotein enzyme secreted by the prostate gland that is often used for diagnosing and predicting progression of prostate cancer in men.  Recent advances in the field of glycobiology […]

Aptamers to discriminate between proteins with Post Translation Modifications

2nd April 2019

Post Translational Modifications (PTM) are biochemical variations of cetain amino acids made to a protein after biosynthesis. These modifications diversify the proteome and play a fundamental role in regulation and targeting of proteins, their interactions with other molecules, as well as their structure, activity and function. Common types of post-translational modifications include phosphorylation, […]