Fig. 6. Tryptase degrades nuclear hnRNP A2/B1 and Lamin B1 in human melanoma cells.
a Nuclear extracts were prepared from human melanoma cells and were incubated with tryptase as indicated, followed by SDS-PAGE analysis and Coomassie staining. The major bands affected by tryptase (arrows) were identified as hnRNP A2/B1 and Lamin B1, respectively. b–d Western blot analysis of hnRNP A2/B1 and Lamin B1 in tryptase-treated nuclear extracts. Quantification of the Lamin B1 and hnRNP A2/B1 bands by densitometric scanning is shown in (c) and (d), respectively. e–g Western blot analysis of hnRNP A2/B1 and Lamin B1 in tryptase-treated cells. Quantification of the Lamin B1 and hnRNP A2/B1 bands by densitometric scanning is shown in (f) and (g), respectively. h Recombinant hnRNP A2/B1 was treated with tryptase, followed by SDS-PAGE and Coomassie staining