Parent categories	1. Cellular processes 1.3. Homeostasis
Neighbouring categories	1.3.1. Metal ion homeostasis (K, Na, Ca, Mg) 1.3.2. Trace metal homeostasis (Cu, Zn, Ni, Mn, Mo) 1.3.3. Acquisition of iron 1.3.4. pH homeostasis
Related categories	Iron metabolism Fur regulon
Overview on the categories (Excel file) All genes and their categories (Excel file)

Note: the main systems for iron uptake in B. subtilis 168 are YfmF-YfmD-YfmE-YfmC-YhfQ and EfeO-EfeU with EfeB PubMed

ABC transporters for theuptake of iron/ siderophores

YusV-FeuB-FeuC-FeuA: uptake of the siderophores enterobactin and bacillibactin
FhuC-FhuB-FhuG-FhuD-YxeB: uptake of ferrichrome und ferrioxamine
YclN-YclO-YclP-YclQ: uptake of petrobactin (a siderophore produced by B. anthracis and B. cereus)
YusV-YfiZ-YfhA-YfiY: uptake of the siderophores schizokinen and arthrobactin
YfmF-YfmD-YfmE-YfmC-YhfQ: uptake of iron/citrate

Elemental iron transport system