--- title: "Guide: Protein Stability Parameters Explained" canonical: "/guide-protein-stability-parameters-explained" published: 2026-09-21 --- # Guide: Protein Stability Parameters Explained [https://nanotempertech.com/](https://nanotempertech.com/) Solutions Choose Solutions Application Products Consumables Application Products Consumables Biologics [Be confident you’re choosing the right biologics candidates.](/biologics/) Products [Prometheus](https://nanotempertech.com/prometheus-panta/) [Learn more](/biologics/) Targeted Protein Degradation [Advance your TPD and induced proximity research.](/tpd/) Products [Dianthus](https://nanotempertech.com/dianthus/) [Dianthus uHTS](https://nanotempertech.com/dianthus-uhts/) [Learn more](/tpd/) Membrane Proteins [Characterize membrane proteins in complex environments with confidence.](/membrane-protein/) Products [Monolith](https://nanotempertech.com/monolith/) [Prometheus](https://nanotempertech.com/prometheus-panta/) [Learn more](/membrane-protein/) [Protein Stability Prometheus Panta One experiment. Multiple insights.](/prometheus-panta/) [Affinity screening Dianthus Tough targets. Confident decisions.](/dianthus/) [High-throughput screening Dianthus uHTS Screen faster. Discover more.](/dianthus-uhts/) [Affinity measurement Monolith Minimal sample. Maximum insight.](/monolith/) [Protein stability Andromeda Crude lysates. Early decisions.](/andromeda/) [Consumables Capillaries and plates designed for high reproducibility. Go to shop](https://shop.nanotempertech.com/) [Reagents Labeling kits and reagents for straightforward assay set up. Go to shop](https://shop.nanotempertech.com/)Technologies [nanoDSF](https://nanotempertech.com/nanodsf/)[Dynamic Light Scattering (DLS)](https://nanotempertech.com/dls-7/)[Static Light Scattering (SLS)](https://nanotempertech.com/sls-6/)[Backreflection](https://nanotempertech.com/backreflection/)[Spectral Shift](https://nanotempertech.com/spectral-shift/)[MicroScale Thermophoresis (MST)](https://nanotempertech.com/mst/)[Temperature Related Intensity Change (TRIC)](https://nanotempertech.com/tric/)[Resources](https://nanotempertech.com/resources/)[Support](https://nanotempertech.com/support/)[About](https://nanotempertech.com/about/)[Shop](https://shop.nanotempertech.com/) EN English汉语 EN English汉语 Search Search{results\_count} resultsDisplaying **{results\_count}** results of **{results\_count\_total}**[More results...](https://nanotempertech.com) ## Guide: Prometheus Panta Parameters Explained ### Multiplexing Optical Methods in Prometheus™ Panta for Comprehensive Protein Characterization When it comes to understanding protein behavior, one technique is rarely enough. Proteins are complex, and their stability, purity, size, and aggregation tendencies all play critical roles in research and development. That’s why the Prometheus™ Panta from NanoTemper stands out — by combining multiple optical methods into a single platform, it enables a truly comprehensive characterization of proteins. ### Why Multiplexing Optical Methods? Protein characterization demands more than just one type of measurement. By multiplexing optical techniques such as nanoDSF, DLS, SLS, and backreflection, Prometheus Panta provides a multidimensional profile of your protein samples. This allows researchers to make more informed and confident decisions when selecting candidates for further development, troubleshooting stability issues, or optimizing formulations. ## Let’s break down the key parameters measured by each method and why they matter. ### Your Guide: Prometheus Panta Parameters Explained Below, we provide a comprehensive overview of the key analytical parameters, definitions and practical relevance for protein characterization, with links to dedicated deep dive articles. Use this guide to better interpret your results and make confident, data-driven decisions throughout your protein analysis workflows. ### Conformational Stability: nanoDSF Prometheus Panta uses nanoDSF (nano differential scanning fluorimetry) to assess thermal and chemical unfolding of proteins. Important parameters include: ###### Ea ###### (Activation energy) ###### The temperature at which unfolding begins. A higher Tonsetgenerally indicates greater protein stability. **Learn More** ###### Tonset ###### The temperature at which unfolding begins. A higher Tonsetgenerally indicates greater protein stability. **Learn More** ###### Tm ###### (melting temperature) ###### The point at which 50% of a protein or domain is unfolded. This is critical for ranking candidates based on thermostability. **Learn More** ###### ΔG ###### (Gibbs free energy) ###### Shows the thermodynamic stability by comparing folded vs. unfolded states **Learn More** ###### Cmor C50 ###### Concentration of denaturant at which 50% unfolding occurs, useful for chemical stability. **Learn More** ###### Initial ratio (350nm/ ###### 330nm fluorescence): ###### Indicates the initial fold state, giving insight into the percentage of folded protein. **Learn More** ### Purity: DLS Dynamic Light Scattering (DLS) in Prometheus Panta helps determine the Polydispersity Index (PDI). This metric reveals the heterogeneity of sample populations — critical for spotting large aggregates or multiple protein populations. **Learn More** ### Sizing: DLS & SLS Prometheus Panta uses DLS and Static Light Scattering (SLS) to explore size-related parameters: ###### MW ###### (Molecular weight): ###### Offers insights into whether your sample contains monomers, oligomers, or aggregates, helping detect modifications or stress-induced changes. **Learn More** ###### Tsize ###### (Temperature size increases) ###### Indicates when particles begin to unfold, oligomerize, or aggregate. **Learn More** ###### rH ###### (Hydrodynamic radius) ###### Derived from diffusion coefficients, it provides an average particle size. **Learn More** ### Aggregation & Self-Association: SLS & DLS Monitoring aggregation is vital to ensure therapeutic viability. Prometheus Panta examines: ###### Tturbidity ###### Temperature at which turbidity (large aggregates) begins to increase. **Learn More** ###### Tscattering ###### Temperature at which scattering (even small aggregates) rises, offering sensitivity beyond turbidity. **Learn More** ###### B22 ###### (Self-interaction parameter) ###### Indicates attractive or repulsive interactions. Negative B22suggests a higher aggregation risk. **Learn More** ###### kD ###### (Diffusion interaction parameter) ###### Indicates attractive or repulsive interactions. Negative B22suggests a higher aggregation risk. **Learn More** For more resources and to download this guide as a PDF, visit our support center. **Download** ### Efficiency in Protein Characterization The power of Prometheus Panta lies in its ability to consolidate all these measurements into a single workflow. This means less sample consumption, more data per experiment, and a holistic understanding of your protein’s properties. Whether you’re screening candidates, optimizing formulations, or ensuring stability, Multiplexing Optical Methods with Prometheus Panta accelerates your path to success. Explore howPrometheus™ Pantacan streamline your protein characterization pipeline and deliver richer insights for your research. **Explore Now** ##### There's more to explore ###### Discover more science-led content, practical guidance, and resources to deepen your knowledge and move your research forward with confidence. **Back to resource centre** Breakthrough faster. Together. [Let's talk](https://nanotempertech.com/contact-specialist/) newsletter Get our latest publications, webinars, and case studies. [https://nanotempertech.com/](https://nanotempertech.com/) We develop biophysical tools and reagents for discovery, development, and beyond. Helping teams to breakthrough faster, together. 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