Fig. 1
From: Effects of melanin from Sepiella Maindroni ink (MSMI) on the intestinal Microbiome of mice
a Operational taxonomic units (OTUs) Rank Abundance. The X-axis indicates the OTU level according to abundance; the Y-Axis indicates the relative abundance of sequences contained in the OTU numbers; every line represents the OTU distribution of an individual sample. If the curve is more gentle, then the sample has a more uniform OTU distribution. b Core bacterial operational taxonomic units (OTUs) in mice from different treatment groups. The core community was determined based on OTUs detected in every fecal sample. The OTUs were assigned at a 97% sequences similarity threshold, and a Venn diagram was used to summarize the number of common OTUs amongst the four groups