Animals 55 nonhuman 49 priority journal 45 Humans 44 controlled study 42 hypoxia inducible factor 1alpha 41 unclassified drug 40 article 39 human 39 Hypoxia-Inducible Factor 1, alpha Subunit 33 hypoxia 32 messenger RNA 29 animal cell 28 protein function 28 animal 27 metabolism 27 protein expression 27 Cell Hypoxia 26 genetics 25 Drosophila melanogaster 23 Drosophila Proteins 22 Transcription Factors 21 signal transduction 21 Oxygen 20 Signal Transduction 20 gene overexpression 20 DNA-Binding Proteins 19 Drosophila 19 protein protein interaction 19 Anoxia 18