Clinical Study

Application of Purified Botulinum Type A Neurotoxin to Treat Experimental Trigeminal Neuropathy in Rats and Patients with Urinary Incontinence and Prostatic Hyperplasia

Figure 2

Simple procedure for purifying type A and B NTXs. Partially purified type A HA-positive PTXs (L and LL) or trypsin-treated (fully activated) type B L toxin was layered on a lactose gel column under acidic conditions (pH 6.0). After washing, the pH was adjusted to 8.0 to obtain the NTX. The bound HA-positive PTX(s) and nontoxic components were eluted with buffer supplemented with 0.2 M lactose.
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