The super helix structure of GFM3P1 and GFM3P2 is easily destroyed by 0.2mol/lNaOH, but that of GFM4P2 is hardly destroyed by 2mol/L NaOH in the Congo red binding assay.

• 经刚果红结合实验表明，GFM3P1、GFM3P2的超螺旋结构容易被0.；2mol/L NaOH破坏，而GFM4P2则相反，其超螺旋结构不能被2mol/L NaOH水溶液破坏。