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Surrogate peptide selection and internal standardization for accurate quantification of endogenous proteins

    Mrunal Palshikar‡

    National Institute of Pharmaceutical Education & Research-Ahmedabad (NIPER-A), An Institute of National Importance, Government of India, Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Opp. Airforce Station, Palaj, Gandhinagar, 382355, Gujarat, India

    ‡Authors contributed equally

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    ,
    Tarang Jadav‡

    National Institute of Pharmaceutical Education & Research-Ahmedabad (NIPER-A), An Institute of National Importance, Government of India, Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Opp. Airforce Station, Palaj, Gandhinagar, 382355, Gujarat, India

    ‡Authors contributed equally

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    ,
    Niraj Rajput

    National Institute of Pharmaceutical Education & Research-Ahmedabad (NIPER-A), An Institute of National Importance, Government of India, Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Opp. Airforce Station, Palaj, Gandhinagar, 382355, Gujarat, India

    ,
    Amit Kumar Sahu

    National Institute of Pharmaceutical Education & Research-Ahmedabad (NIPER-A), An Institute of National Importance, Government of India, Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Opp. Airforce Station, Palaj, Gandhinagar, 382355, Gujarat, India

    &
    Pinaki Sengupta

    *Author for correspondence: Tel.: +91 796 674 5555;

    E-mail Address: psg.725@gmail.com

    National Institute of Pharmaceutical Education & Research-Ahmedabad (NIPER-A), An Institute of National Importance, Government of India, Department of Pharmaceuticals, Ministry of Chemicals & Fertilizers, Opp. Airforce Station, Palaj, Gandhinagar, 382355, Gujarat, India

    Published Online:https://doi.org/10.4155/bio-2022-0071

    Relative quantification techniques have dominated the field of proteomics. However, biomarker discovery, mathematical model development and studies on transporter-mediated drug disposition still need absolute quantification of proteins. The quality of data of trace-level protein quantification is solely dependent on the specific selection of surrogate peptides. Selection of surrogate peptides has a major impact on the accuracy of the method. In this article, the advanced approaches for selection of surrogate peptides, which can provide absolute quantification of the proteins are discussed. In addition, internal standardization, which accounts for variations in the quantitation process to achieve absolute protein quantification is discussed.

    Papers of special note have been highlighted as: • of interest; •• of considerable interest

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