Figure 3 | Scientific Reports

Figure 3

From: Enhanced purification coupled with biophysical analyses shows cross-β structure as a core building block for Streptococcus mutans functional amyloids

Figure 3

Congo red-induced birefringence of amyloid material before and after treatment with proteinase K (PK). Purified recombinant Smu_63c, and recombinant C123 and AgA polypeptides, which correspond to naturally occurring amyloidogenic derivatives of P1 and WapA respectively, were evaluated. Samples were visualized by bright-field microscopy and under crossed polarizing light filters. Scale Bar 50 µm.

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