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After fitting the log of the EC50, Prism does the antilogarithm transform to report the EC50 and its logarithm. Prism assumes that you used base 10 logarithms, ...

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... IC50. Explore the Knowledgebase. Analyze, graph and present your scientific work easily with GraphPad Prism. No coding required. Try for Free. Scientific ...

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Note that the EC50 is NOT the concentration that provokes a response Y that equals 50. Keywords: troubleshoot, IC50, dose-response, expect, strange, wrong ...

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Equation: Absolute IC50. Receptor binding - Key concepts; Receptor binding - Saturation binding; Receptor binding - Competitive binding; Receptor binding ...

https://www.graphpad.com/guides/prism/latest/curve-fitting/

Equation: Absolute IC50. Receptor binding - Key concepts; Receptor binding - Saturation binding; Receptor binding - Competitive binding; Receptor binding ...

https://www.graphpad.com/guides/prism/latest/curve-fitting/

Equation: Absolute IC50. Dose-response -- Special (X is Log[Concentration]); Receptor binding - Key concepts; Receptor binding - Saturation binding; Receptor ...

https://www.graphpad.com/guides/prism/latest/curve-fitting/

New: Absolute IC50 equation added to Nonlinear Regression Equation library. The absolute IC50 is the concentration that gives a response of 50%, which is ...

https://www.graphpad.com/updates/

Q&A about R2 What does R2 quantify The value R2 quantifies goodness of fit. It compares the fit of your model to the fit of a horizontal line through the ...

https://www.graphpad.com/guides/prism/latest/curve-fitting/

A confidence interval consists of two confidence limits. In some cases, Prism can only determine one confidence limit and reports the other limit as "???".

https://www.graphpad.com/guides/prism/latest/curve-fitting/

Those will open fine in Prism 4 as a user-defined equation. The problem only happens with equations chosen from the classic list. Keywords: IC50 missing ...

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