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. 2018 Jul 9;13(7):e0200369. doi: 10.1371/journal.pone.0200369

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© 2018 Moon et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 3 — Pairwise variations between the normalization factors (NF_n and NF_n+1) were separately analyzed to determine the optimal number of reference genes for normalization in forager head and nurse head samples (A). In order to compare the target gene expression between forager and nurse heads, the optimal number of reference genes for normalization was analyzed using combined data from forager and nurse (B).