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Protein Expression Facility
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  • About
    • Advisory board
    • FAQ
    • Workshops and events
  • Research Services
    • Project design
    • Molecular engineering
    • Expression optimisation
    • Scale-up expression
    • Protein purification
    • Analytics and characterisation
    • Services quote
    • Malaria proteins
    • Reagents and laboratory resources
  • UQ Resource Centre
  • Impact
    • Testimonials
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  • Services Quote

Protein Characterisation Types

Protein Identity

Peptide Mass Fingerprinting (PMF)

Verify protein sequences, compare known and acquired sequence


SDS-PAGE analysis

Qualitative analysis of protein purity and molecular weight


Western blot analysis

Verify band of interest

 

Mass

Capillary electrophoresis SDS (CE-SDS)

(Training for independent access available)

Quantify protein purity

Determine the molecular weight


Intact Mass Analysis (IMA)

Verify the mass of non-denatured proteins

Detect post-translational modification of proteins


Mass photometry​

Measure the molecular mass of proteins and protein complexes in solution

Analyse homogeneity and structural integrity


Size exclusion chromatography coupled with multi-angle light scattering (SEC-MALS)

Verify the oligomeric state of proteins

Determine the molar mass of separated peaks

Size

Dynamic Light Scattering (DLS)​

(Training for independent access available)

Determine the melting temperature of protein

Analyse the thermal stability of a proteins in various formulations

Measure size and size distribution

Estimate polydispersity

Quantify the type and degree of aggregations


Field-flow fractionation coupled with multi-angle light scattering (FFF-MALS)

(Training for independent access available)

Fractionate macromolecules and measure molar mass and size distributions

Estimate polydispersity

Analyse structural integrity


Size exclusion chromatography coupled with multi-angle light scattering (SEC-MALS)

Verify the oligomeric state of proteins

Determine the molar mass of separated peaks


Transmission Electron Microscopy (TEM)

Visualise negatively stained macromolecular structures

Charge

Capillary isoelectric focusing (cIEF)

(Training for independent access available)

Separate biomolecules according to their isoelectric point

Analyse charge heterogeneity


Cation-exchange high-performance liquid chromatography (CEX-HPLC)

Separate and quantify biomolecules based on charge

Determine the presence of charge variants

Homogeneity

Dynamic Light Scattering (DLS)

(Training for independent access available)

Determine the melting temperature of proteins

Analyse the thermal stability of a protein in various formulations

Measure size and size distribution

Estimate polydispersity

Quantify the type and degree of aggregations


Field-flow fractionation coupled with multi-angle light scattering (FFF-MALS)

(Training for independent access available)

Fractionate macromolecules and measure molar mass and size distributions

Estimate polydispersity

Analyse structural integrity


Mass photometry

Measure the molecular mass of proteins and protein assemblies in solution

Analyse homogeneity and structural integrity


Size exclusion chromatography coupled with multi-angle light scattering (SEC-MALS)

Verify the oligomeric state of proteins

Determine the molar mass of separate peaks

Stability

Dynamic Light Scattering (DLS)

(Training for independent access available)

Determine the melting temperature of proteins

Analyse the thermal stability of a protein in various formulations

Measure size and size distribution

Estimate polydispersity

Quantify the type and degree of aggregations


Field-flow fractionation coupled with multi-angle light scattering (FFF-MALS)

(Training for independent access available)

Fractionate macromolecules and measure molar mass and size distributions

Estimate polydispersity

Analyse structural integrity


Mass photometry

Measure the molecular mass of proteins and protein assemblies in solution

Analyse homogeneity and structural integrity


Nano Differential Scanning Fluorometry (nanoDSF)

(Training for independent access available)

Analyse the thermal stability of a protein in various formulations

Determine the precise unfolding temperature

Determine aggregation onset temperature


Size exclusion chromatography coupled with multi-angle light scattering (SEC-MALS)

Verify the oligomeric state of proteins

Determine the molar mass of separated peaks


Transmission Electron Microscopy (TEM)

Visualise negatively stained macromolecular structures 


Circular Dichroism (CD) Spectroscopy

Determine the secondary structure content of proteins

Assess inclusion body refolding strategies

Analyse the structural stability of proteins in various formulations


 

Quantity

A280

Measure the total protein concentration


Bicinchoninic acid (BCA) calorimetric assay

Measure the total protein concentration


Surface Plasmon Resonance (SPR)

(Offered by the National Biologics Facility)

Measure the target protein concentration in complex samples (purified standards may be required for accurate measurements)


Protein A high-performance liquid chromatography (Protein A HPLC)

Measure antibody titre

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