title: Concentration gradients of chemotactic factors in chemotaxis assays.
authors.forename: D A
authors.initials: DA
authors.lastname: Lauffenburger
authors.forename: R T
authors.initials: RT
authors.lastname: Tranquillo
authors.forename: S H
authors.initials: SH
authors.lastname: Zigmond
mesh_terms: D000818:Animals; D002630:Chemotactic Factors; D002634:Chemotaxis, Leukocyte; D005374:Filtration; D006801:Humans; D066298:In Vitro Techniques; D008722:Methods; D012685:Sepharose
chemical_list: D002630:Chemotactic Factors; D012685:Sepharose