Related by context. Frequent words. (Click for all words.) 66 calcium ions 63 ions 62 cell membrane 61 cell membranes 61 lithium ions 60 micelles 59 bile acids 59 metal ions 58 reactants 58 anion 57 molecules 57 plasma membrane 57 lipoproteins 56 oxygen atoms 56 lymphatic vessels 55 endocytosis 55 myoglobin 55 cysteine 55 intracellular 55 epithelial cells 55 microbubbles 55 aerosol particles 55 chloride 55 aqueous solution 55 oxygen atom 55 nanospheres 55 vesicle 55 glycans 55 lipids 55 mutant protein 54 nitric oxide NO 54 extracellular 54 Aβ 54 membranes 54 electrons 54 stomata 54 microflora 53 galactose 53 liposomes 53 excitons 53 phospholipids 53 sialic acid 53 particles 53 reactive oxygen species 53 outer membrane 53 molecule 53 membrane 53 dimers 53 biochemical processes 53 analyte 53 chloroplasts 53 thyroid hormones 53 monolayer 53 nanoparticles 53 lysosomes 53 Nitric oxide 53 capillaries 52 chemical messengers 52 bloodstream 52 tubules 52 adsorbed 52 fluoresce 52 stromal cells 52 hydrogen atoms 52 biochemical reactions 52 reversibly 52 ceramide 52 iodide 52 cytoplasm 52 macromolecules 52 adsorption 52 glycoproteins 52 biological molecules 52 redox 52 fluorescent dye 52 phenylalanine 52 phospholipid 51 oxidant 51 oxidants 51 organelle 51 ketones 51 arachidonic acid 51 intestinal bacteria 51 microparticles 51 crystal lattice 51 reactive oxygen species ROS 51 anaerobic bacteria 51 fibrils 51 heme 51 leukocytes 51 glycolysis 51 ion channels 51 auxin 51 vesicles 51 NMDA receptors 51 phonons 51 alveoli 51 endoplasmic reticulum 51 nanocrystals 50 cellular metabolism 50 GI tract