Fig. 3From: Multi-proxy analyses of a mid-15th century Middle Iron Age Bantu-speaker palaeo-faecal specimen elucidates the configuration of the ‘ancestral’ sub-Saharan African intestinal microbiomeFunctional (metabolic) comparison of the ancient (BRS and Ötzi), ethnographic (Hadza and Malawian) and contemporary (Italian) faecal-derived human IMs based on KO-gene analyses for the twenty-four ancient authenticated IM taxa listed in Table 1 (Table S10). The heat map is based on Spearman’s correlation coefficients comparing differences in metabolic functionality for the BRS IM (i.e. BRS2, BRS3 and BRS4) with the ancient, traditional and contemporary comparative IM datasetsBack to article page