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The effects of temperature on enzyme activity. Top - increasing temperature increases the rate of reaction (Q 10 coefficient). Middle - the fraction of folded and functional enzyme decreases above its denaturation temperature. Bottom - consequently, an enzyme's optimal rate of reaction is at an intermediate temperature.
The effects of temperature on enzyme activity. Top: increasing temperature increases the rate of reaction (Q10 coefficient). Middle: the fraction of folded and functional enzyme decreases above its denaturation temperature. Bottom: consequently, an enzyme's optimal rate of reaction is at an intermediate temperature.
The activity of chlorophyllase also depends on the pH and ionic content of the medium. The values of kcat and kcat/Km of chlorophyllase in the presence of chlorophyll showed pKa values of 6.3 and 6.7, respectively. Temperature also affects chlorophyllase activity. Wheat chlorophyllase is active from 25 to 75 °C.
847 12359 Ensembl ENSG00000121691 ENSMUSG00000027187 UniProt P04040 P24270 RefSeq (mRNA) NM_001752 NM_009804 RefSeq (protein) NP_001743 NP_033934 Location (UCSC) Chr 11: 34.44 – 34.47 Mb Chr 2: 103.28 – 103.32 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Catalase is a common enzyme found in nearly all living organisms exposed to oxygen (such as bacteria, plants, and animals ...
The key role of catechol oxidase in enzymatic browning makes it a common target for inhibition. While a number of inhibitory strategies exist such as high temperature treatments(70-90 °C) to eliminate catechol oxidase catalytic activity, [6] a popular strategy is decreasing the pH with citric acid. Catechol oxidase is more catalytically active ...
Polyphenol oxidase is an enzyme found throughout the plant and animal kingdoms, [31] including most fruits and vegetables. [32] PPO has importance to the food industry because it catalyzes enzymatic browning when tissue is damaged from bruising, compression or indentations, making the produce less marketable and causing economic loss.
C 4 plants use the enzyme PEP carboxylase initially, which has a higher affinity for CO 2. The process first makes a 4-carbon intermediate compound, hence the name C 4 plants, which is shuttled into a site of C 3 photosynthesis then decarboxylated, releasing CO 2 to boost the concentration of CO 2 .
NADP-malic enzyme is one of three decarboxylation enzymes used in the inorganic carbon concentrating mechanisms of C4 and CAM plants. The others are NAD-malic enzyme and PEP carboxykinase . [ 2 ] [ 3 ] Although often one of the three photosynthetic decarboxylases predominate, the simultaneous operation of all three is also shown to exist.