2,3-dihydroxyphenylpropionate/2,3-dihydroxicinnamic acid 1,2-dioxygenase mhpB mcpI MPIQLECLSHTPLHGYVDPAPEVVAEVERVQAAARDRVRAFDPELVVVFAPDHFNGFFYDVMPPFCIGAAATAIGDFKSLAGKLPVPADLALSLAESVMAADIDVALSHRMQVDHGCADALAALTGSLHRYPVIPVFINSVAPPMATLRRARLLGDAVGRFLSRAGKRVLVVGSGGISHEPPVPELAGASEEVAERLIAGRNPSPESAARQARTVAAAKSFVAGDSHLHPLNPEWDRAFLSLLASGELTAVDGMTNDAITRDGGKSAHEIRTWVAAFGALAAYGPYRASLDFYRAIPEWIAGFATMHAEPAAV MHPB_CUPNE 313 Catalyzes the non-heme iron(II)-dependent oxidative cleavage of 2,3-dihydroxyphenylpropionic acid and 2,3- dihydroxicinnamic acid into 2-hydroxy-6-ketononadienedioate and 2- hydroxy-6-ketononatrienedioate, respectively. Also catalyzes the cleavage of catechol.