Sentence:  ( 4 ) The conjugates were passed through a diethylaminoethyl ( DEAE - ) cellulose <WSD>column</WSD> equilibrated with neutral phosphate buffer ( PBS ) containing * * f potassium phosphate and * * f . 
Meaning of the word marked with <WSD> tags:  a vertical glass tube used in column chromatography; a mixture is poured in the top and washed through a stationary substance where components of the mixture are adsorbed selectively to form colored bands