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Literature summary for 1.14.18.1 extracted from

  • Hsu, A.F.; Kalan, E.B.; Bills, D.D.
    Partial purification and characterization of the soluble polyphenol oxidases from suspension cultures of Papaver somniferum (1984), Plant Sci. Lett., 34, 315-322.
No PubMed abstract available
Search for more literature for 1.14.18.1

Inhibitors

Inhibitors Comment Organism Structure
CN- 1 mM, 59% inhibition of isoenzyme a, 83% inhibition of isoenzyme B Papaver somniferum
diethyldithiocarbamate 1 mM, 34% inhibition of isoenzyme A, 95% inhibition of isoenzyme B Papaver somniferum
L-ascorbic acid
-
 Papaver somniferum

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
5
-
 catechol
-
 Papaver somniferum
5
-
 catechol isoenzymes A and B Papaver somniferum

Organism

Organism UniProt Comment Textmining
Papaver somniferum
-
 opium, isoenzymes A and B
-

Purification (Commentary)

Purification (Comment) Organism
isoenzymes A and B, ammonium sulfate, CM-cellulose, Sephacryl S-200 Papaver somniferum

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
 isoenzyme A: 92.0 units, isoenzyme B: 97 units, 1 unit is defined as absorbance change of 0.001 at 430 nm per min Papaver somniferum

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
catechol + 1/2 O2
-
 Papaver somniferum 1,2-benzoquinone + H2O
-
 ?
L-tyrosine + O2 + AH2 no activity with tyrosine Papaver somniferum L-dopa + H2O + A
-
 ?
p-cresol + O2 no activity Papaver somniferum 4-methylpyrocatechol + H2O
-
 ?