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. 2019 Aug 24;20(17):4139. doi: 10.3390/ijms20174139

Figure 1.

Figure 1

Purification and characterization of the thermostable keratanase. (A) SDS-PAGE of thermostable keratanase. The purified thermostable keratanase was applied to a 10% Tris-Glycine SDS-PAGE gel, and the proteins were visualized by Coomassie Brilliant Blue G-250 staining. Lane 1, markers; lane 2, purified enzyme (5 mU, 0.4 μg). (B) Treatment with 1 μU/mL purified thermostable keratanase degraded KS chains but not diHS-0S, diHS-NS and C6S chains in MPS IVA chondrocyte cells from 3-dimensional (3D) culture; n = 3. Statistics were analyzed by unpaired t-test. Data are presented as mean ± SD. * p < 0.05. C6S: chondroitin 6 sulfate, HS: heparan sulfate, KS: keratan sulfate, NT: untreated, TSK: thermostable keratanase.