This protocol shares an ImageJ macro that enables easy and quick estimation of molecular weights from gel electrophoresis images, including the agarose gel electrophoresis for nucleic acids and the SDS-PAGE for proteins. By selecting the bands (size markers and samples of unknown size) and running this macro, you can estimate the size of your bands based on the curve fitted to your size marker data.
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Kenji Ohgane (2024) studied this question.
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