column,2.0
biotech,1.0
ph,1.0
superdex,1.0
amersham,1.0
tris-hcl,1.0
flow-through,1.0
concentrated,1.0
applied,1.0
dtt,1.0
pre-equilibrated,1.0
size-exclusion,1.0
nacl,1.0
fraction,1.0
ni-nta,1.0
