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. 2021 Aug 12;12:716177. doi: 10.3389/fphar.2021.716177

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Copyright © 2021 Ge, Wang, Yu, Cao, Chen, Cheng and Ding.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Chromatographic and mass spectrometry analysis of ABPPk. (A) Chromatographic analysis of ABPPk, monitored at 220 nm. Peaks numbered 1 and 2 are two peptides contained in ABPPk. (B) TOF-MS spectrometry of Peak 1, which was ionized to form trivalent ions with an average m/z of 1194.4 and divalent ions with an average m/z of 1791.1. The molecular weight of the polypeptide was about 3.58 kD. (C) TOF-MS spectrometry of Peak 2, which was ionized to form trivalent ions with an average m/z of 1140.4 and divalent ions with an average m/z of 1711.1. The molecular weight of the polypeptide was about 3.42 kD.