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In plants, carbonic anhydrase helps raise the concentration of CO 2 within the chloroplast in order to increase the carboxylation rate of the enzyme RuBisCO. This is the reaction that integrates CO 2 into organic carbon sugars during photosynthesis , and can use only the CO 2 form of carbon, not carbonic acid or bicarbonate.
Carbonic anhydrase, an enzyme that requires zinc (gray sphere in this image), is essential for plant health. [1] Zinc deficiency occurs when plant growth is limited because the plant cannot take up sufficient quantities of this essential micronutrient from its growing medium. Zinc is one of the most important micronutrients. [2]
Carbonic anhydrase needs a family of carbon base enzymes for the hydration of carbon dioxide and acid–base homeostasis, that regulates PH levels in life. [ 32 ] [ 33 ] In plant life, liquid water is needed for photosynthesis , the biological process plants use to convert light energy and carbon dioxide into chemical energy . [ 34 ]
C 3 carbon fixation occurs in all plants as the first step of the Calvin–Benson cycle. (In C 4 and CAM plants, carbon dioxide is drawn out of malate and into this reaction rather than directly from the air.) Cross section of a C 3 plant, specifically of an Arabidopsis thaliana leaf. Vascular bundles shown.
Other forms of carbonic anhydrase enzyme are not present in the plasma, restricting the equilibrium reaction of CO 2 + H 2 O = H 2 CO 3 = H+ HCO − 3. CO 2 in the plasma diffuses into the Red Blood Cell. CA is present within the Red Blood Cell, facilitating the conversion of CO 2 to HCO − 3. HCO − 3 so produced is transferred by the HCO −
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A full length CcmM protein consists of a gamma-carbonic anhydrase domain and three to five RubisCO small subunit-like domains (SSLDs) on its C-terminus. [49] The ccmM gene contains an internal translation site that produces a short form of CcmM which only consists of SSLDs; both long and short forms of CcmM are required for beta-carboxysome ...
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