Positively charged groups at cell surfaces.
D000818:Animals; D001565:Benzoates; D002462:Cell Membrane / Q000032:analysis*; D004563:Electrochemistry; D004586:Electrophoresis; D004912:Erythrocytes; D005557:Formaldehyde; D006801:Humans; D066298:In Vitro Techniques; D008722:Methods; D051379:Mice; D012516:Osteosarcoma; D011725:Pyridines; D012513:Sarcoma, Experimental; D013451:Sulfonic Acids; D013499:Surface Properties; D013997:Time Factors; D014357:Trypsin
D001565:Benzoates; D011725:Pyridines; D013451:Sulfonic Acids; D005557:Formaldehyde; D014357:Trypsin