Related by context. Frequent words. (Click for all words.) 59 polyethylene glycol PEG 53 magnetic beads 51 liposome 50 polypeptides 50 outer membrane 49 microcapsules 48 siRNA molecules 48 integrase 48 fibrin 48 bacterial enzyme 48 membrane 48 collagen matrix 47 actin filaments 47 PEGylated 47 transdermal patches 47 biomolecule 47 recombinant protein 47 CCR5 receptor 46 topoisomerase 46 protein fragment 45 glycans 45 polymerized 45 bronchoscope 45 oligonucleotides 45 microsphere 45 peptide 45 collagenase 44 fluoresces 44 endotracheal tube 44 linker 44 bioabsorbable 44 covalent 44 nanoparticle 44 retractor 44 nanospheres 44 cell membrane 44 aliphatic 43 molecule 43 cannula 43 biodegradable polymer 43 pneumatically 43 integrins 43 microfluidic chip 43 fibronectin 43 radially 43 hollow tubes 43 receptor molecules 43 monomeric 43 antibody 43 mitochondrion 43 microneedle 43 catheter inserted 42 peptides 42 hydrogel 42 thermally 42 vesicle 42 polymer composite 42 crosslinking 42 dilator 42 injector 42 micelles 42 homolog 42 spacer 42 trocar 42 potassium ions 42 ligand 42 amyloid fibrils 42 tubulin 42 macromolecular 41 collimator 41 extracellular matrix 41 glial cell 41 capsid 41 polymeric 41 DNA strands 41 molecules 41 tubules 41 resorbable 41 electromagnet 41 vaginal tissue 41 filament 41 ribonucleic acid 41 iliac 41 vas deferens 41 transversely 41 electrode 41 nanomachines 40 oligomers 40 collagen fibers 40 membranes 40 topical steroid 40 Vif 40 buccal 40 handpieces 40 stratum corneum 40 macromolecules 40 block copolymer 40 vacuum hose 40 diseased arteries 40 RNA molecule 40 cell cytoplasm