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Purification, N-terminal amino acid sequence and properties of hydroxymethylbilane synthase (porphobilinogen deaminase) from Escherichia coli.


ABSTRACT: Hydroxymethylbilane synthase (porphobilinogen deaminase) was purified to apparent homogeneity from Escherichia coli. The enzyme is a monomer of Mr approx. 40,000. The Km for porphobilinogen and relative Vmax. values have been obtained at various pH values over the range 6.2-8.8, enabling pK values for ionizable groups important for activity to be determined. The N-terminal amino acid sequence is presented.

SUBMITTER: Hart GJ 

PROVIDER: S-EPMC1147405 | biostudies-other | 1986 Nov

REPOSITORIES: biostudies-other

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