controlled study 6 helix loop helix protein 6 messenger RNA 6 nonhuman 6 reverse transcription polymerase chain reaction 6 unclassified drug 6 Amino Acid Sequence 4 Amino acids 4 Animalia 4 Animals 4 Aryl Hydrocarbon Receptor Nuclear Translocator 4 Carrier Proteins 4 Cell Hypoxia 4 Cell Line 4 Cell culture 4 Chelation 4 DNA-Binding Proteins 4 Drosophila 4 Drosophila Proteins 4 Gene Expression Regulation 4 Genes 4 Humans 4 Hydroxylation 4 Hypoxia-Inducible Factor 1, alpha Subunit 4 Iron 4 Iron chelation 4 Molecular Sequence Data 4 Northern blotting 4 PAS protein 4 RNA 4