Related by context. Frequent words. (Click for all words.) 59 photoreceptor 59 rhodopsin 59 mesenchymal cells 59 photoreceptors 57 pineal gland 56 keratinocytes 56 chloroplasts 55 Wnt signaling 54 cellular metabolism 54 auxin 54 germ cells 54 odorants 53 neurones 53 neural tissue 53 regulate gene expression 53 biochemical processes 53 retinal cells 53 NKT cells 53 neuroendocrine 53 Nerve cells 53 neuronal activity 53 tumor microenvironment 53 tyrosine 53 organelle 52 nitrogen fixing 52 glial cells 52 ribozyme 52 malignant transformation 52 neurotransmitter serotonin 52 microcirculation 52 microbiota 52 sensory neurons 52 homeostatic 52 biochemical pathways 51 chloroplast 51 photoreceptor cells 51 neurons 51 signaling molecules 51 morphogenesis 51 mammalian brain 51 cell signaling pathway 51 hormone receptors 51 neurotransmission 51 reactive oxygen species 51 excitatory 51 synaptic plasticity 51 astrocyte 51 dopamine neurons 51 visual cortex 51 RNA molecule 51 neural circuitry 51 neural circuits 51 enzymatic activity 51 biochemical reactions 51 neuronal cells 51 neuropeptides 51 reproductive hormones 50 contractile 50 membrane protein 50 dentate gyrus 50 photosynthetic 50 biochemically 50 magnetic fields 50 sensorimotor 50 homologous recombination 50 thyroid hormones 50 circadian clock 50 metabolic processes 50 L dopa 50 hormone melatonin 50 RPE cells 50 cell adhesion 50 microscale 50 stomata 50 sensory organs 50 biochemical pathway 50 receptor proteins 50 chemical messengers 50 carotenoid 49 gold nanorods 49 superoxide 49 sensory stimuli 49 sensory input 49 cellular pathways 49 fluorescent proteins 49 nuclei 49 proinflammatory 49 hypothalamic 49 external stimuli 49 biomolecule 49 organelles 49 signaling molecule 49 dendritic spines 49 photosynthesis 49 reversibly 49 adaptively 49 biological molecules 49 dye molecules 49 gene transcription 49 metabolic pathway 49 sensory nerves