Figure 2From: Bifidobacteria strains isolated from stools of iron deficient infants can efficiently sequester iron Characterization of bifidobacterial strains for siderophore activity and iron uptake measured by the CAS assay and iron internalization test, respectively. Columns show siderophore activity (%) (n = 2) and squares show the results of iron internalization (μM) (n = 2). Striped columns indicate selected strains after strain characterization. Error bars correspond to standard deviations calculated for two independent replicates for iron uptake and siderophore activity respectively.Back to article page