Affinity chromatography with denatured gMDH of hsp70s in protein extracts of watermelon cotyledons. (A) SDS/PAGE and Coomassie blue staining; (B) SDS/PAGE and decoration with a-hsp70 antibodies. A1, molecular mass markers 97 and 66 kDa; A2, Mg-ATP eluate; B1, crude protein extract; B2, run through; B3, Mg-ATP eluate.