Fig. 1From: Marine-freshwater prokaryotic transitions require extensive changes in the predicted proteomeMetaproteome pI versus relative frequency plot of marine (Mediterranean Sea, 30 m deep), brackish (Caspian Sea, 15 m), and freshwater (Tous reservoir, 12–25 m, and Lake Baikal, 20 m) habitats. N indicates the number of proteins retrieved from each metaproteome and used in this comparisonBack to article page