test
node1
GO:0051234
establishment of
localization
node2
GO:0006810
transport
node1->node2
node5
GO:0006811
monoatomic ion
transport
node2->node5
node9
GO:0071702
organic substance
transport
node2->node9
node11
GO:0071705
nitrogen compound
transport
node2->node11
node3
BFO:0000003
occurrent
node3->node3
node4
BFO:0000015
process
node3->node4
node15
GO:0008150
biological_process
node4->node15
node13
GO:0006812
monoatomic cation
transport
node5->node13
node6
GO:0051179
localization
node6->node1
node7
GO:1901678
iron coordination
entity transport
node8
GO:0015886
heme transport
node7->node8
node9->node8
node10
GO:0006826
iron ion transport
node10->node7
node11->node8
node12
BFO:0000001
entity
node12->node3
node14
GO:0030001
metal ion transport
node13->node14
node16
GO:0000041
transition metal ion
transport
node14->node16
node15->node6
node16->node10