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. 2019 Aug 13;10:1044. doi: 10.3389/fphys.2019.01044

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Copyright © 2019 Idakwo, Thangapandian, Luttrell, Zhou, Zhang and Gong.

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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Murcko frameworks exclusively present in agonists (A) and antagonists (B) as well as Murcko rings exclusively present in agonists (C) and antagonists (D). Also see Figure 5 for the numbers of class-specific frameworks and rings for these two classes.