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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Section of the gill of giant mudskipper, immunofluorescence of 5-HT and TLR2, 40×, scale bar 40 μm. Scattered MCs positive to 5-HT (green) and TLR2 (red) are evident (arrows). The colocalization of the antibodies is clear and confirmed by the ‘display profile’ function.