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SDS–PAGE of expressed and purified proteins. Lane 1: crude WXyn43, lane 2: WXyn43, lane 3: molecular marker (from the top: 250, 150, 100, 75, 50, 37, 25, 20, 15 and 10 kDa), lane 4: crude WXyn43 truncated catalytic domain and lane 5: WXyn43 truncated catalytic domain.
