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SDS-PAGE profile of proteins isolated from Bifidobacterium longum ssp. longum CCM 7952 (A) and CCDM 372 (B) using different methods: M, molecular mass marker; I, 10 mM EDTA; II, 0,2 M glycine; III, 1 M LiCl; IV, 8 M urea; V, 5 M guanidine hydrochloride; VI, Heilmann methods. Gels were stained with Coomassie Brilliant Blue.
