scholarly journals Carbonic Anhydrase Activity in Plants in Relation to Zinc Content

1952 ◽  
Vol 5 (2) ◽  
pp. 244 ◽  
Author(s):  
JG Wood ◽  
Pamela M Sibly
Keyword(s):  
Life Cycle ◽  
Carbonic Anhydrase ◽  
Zinc Content ◽  
Carbonic Anhydrase Activity ◽  
Deficiency Symptoms ◽  
Maximum Value ◽  
Chloroplast Fraction

Throughout the life cycle of oat plants carbonic anhydrase activity, which is restricted to the non-chloroplast fraction of leaves, reaches a maximum value and then decreases. After appearance of deficiency symptoms carbonic anhydrase activity is less in zinc-deficient plants than in fully manured controls of the same age and is associated with a lower zinc content of the leaves.

scholarly journals THE RELATIONSHIP BETWEEN CARBONIC ANHYDRASE ACTIVITY AND ZINC CONTENT OF ERYTHROCYTES IN NORMAL, IN ANEMIC AND OTHER PATHOLOGIC CONDITIONS

Blood ◽  
1949 ◽  
Vol 4 (5) ◽  
pp. 467-478 ◽  
Author(s):  
BERT L. VALLEE ◽  
HERBERT D. LEWIS ◽  
MARK D. ALTSCHULE ◽  
JOHN G. GIBSON
Keyword(s):  
Carbonic Anhydrase ◽  
Red Blood Cells ◽  
Pernicious Anemia ◽  
Blood Cells ◽  
Zinc Concentration ◽  
Zinc Content ◽  
Carbonic Anhydrase Activity ◽  
Almost All ◽  
The Relationship ◽  
Parallel Fashion

Abstract A good correlation exists between zinc content and carbonic anhydrase activity of the red blood cells under all conditions studied, including anemia and polycythemia. In almost all patients with anemias other than pernicious anemia, both zinc and carbonic anhydrase levels were lowered in parallel fashion. These changes were proportional to decreases in hematocrit and hemoglobin levels and erythrocyte counts so that both zinc and carbonic anhydrase values per unit of RBC were in the normal range. In a few instances of anemia associated with leukemia and in one of sickle cell anemia, neither zinc content nor carbonic anhydrase activity was decreased in proportion to the anemia; in these cases the zinc and carbonic anhydrase levels per unit of blood were both elevated to the same degree. Patients with pernicious anemia showed no decrease in absolute values for zinc and carbonic anhydrase activity in spite of marked lowering of hematocrit and hemoglobin levels and of erythrocyte count. Accordingly, both zinc concentration and carbonic anhydrase activity per unit of blood were elevated, often to a marked degree. These increases were parallel, varying inversely with the degree of anemia; when they regressed under treatment, both did so at the same rate. There are no methods available for estimating carbonic anhydrase concentration; all methods now in use measure only the activity of the enzyme. It is suggested that zinc concentration could be used as an indicator of carbonic anhydrase content of the red blood cells.

ZINC, CARBONIC ANHYDRASE, AND PHOSPHATASE IN THE PROSTATIC GLANDS OF THE RAT

1955 ◽  
Vol 33 (2) ◽  
pp. 181-190 ◽  
Author(s):  
M. I. Fischer ◽  
A. O. Tikkala ◽  
C. A. Mawson
Keyword(s):  
Carbonic Anhydrase ◽  
Small Proportion ◽  
Soft Tissues ◽  
Zinc Content ◽  
Carbonic Anhydrase Activity ◽  
Ventral Prostate ◽  
Alkaline Phosphatases ◽  
Acid And Alkaline Phosphatases ◽  
Consistent Relationship

The concentration of zinc in the dorsolateral prostate of the rat increases rapidly during infancy, reaching a maximum of 250-300 μgm./gm. at an age of about 160 days. This figure is 10 times as high as that found for most other soft tissues. Carbonic anhydrase activity behaves similarly, with a maximum at about 200 days, when it is 100 times the amount found in most other organs. Zinc which occurs as part of the carbonic anhydrase molecule forms only a small proportion of the total zinc content of the tissue at all ages. Zinc and carbonic anhydrase occur only in small amounts in the ventral prostate. The activities of acid and alkaline phosphatases in ventral and dorsolateral prostates are not correlated with age, and zinc and enzyme concentrations bear no consistent relationship to one another. Differences between the phosphatases of liver and prostatic complex in the rat are briefly discussed.

ZINC, CARBONIC ANHYDRASE, AND PHOSPHATASE IN THE PROSTATIC GLANDS OF THE RAT

1955 ◽  
Vol 33 (1) ◽  
pp. 181-190 ◽  
Author(s):  
M. I. Fischer ◽  
A. O. Tikkala ◽  
C. A. Mawson
Keyword(s):  
Carbonic Anhydrase ◽  
Small Proportion ◽  
Soft Tissues ◽  
Zinc Content ◽  
Carbonic Anhydrase Activity ◽  
Ventral Prostate ◽  
Alkaline Phosphatases ◽  
Acid And Alkaline Phosphatases ◽  
Consistent Relationship

The concentration of zinc in the dorsolateral prostate of the rat increases rapidly during infancy, reaching a maximum of 250-300 μgm./gm. at an age of about 160 days. This figure is 10 times as high as that found for most other soft tissues. Carbonic anhydrase activity behaves similarly, with a maximum at about 200 days, when it is 100 times the amount found in most other organs. Zinc which occurs as part of the carbonic anhydrase molecule forms only a small proportion of the total zinc content of the tissue at all ages. Zinc and carbonic anhydrase occur only in small amounts in the ventral prostate. The activities of acid and alkaline phosphatases in ventral and dorsolateral prostates are not correlated with age, and zinc and enzyme concentrations bear no consistent relationship to one another. Differences between the phosphatases of liver and prostatic complex in the rat are briefly discussed.

1123: Renal Oxalate Transport Depends on Local Carbonic Anhydrase Activity in the Proximal Tubule

2004 ◽  
Vol 171 (4S) ◽  
pp. 296-296
Author(s):  
Michael Straub ◽  
Joséphine Befolo-Elo ◽  
Richard E Hautmann ◽  
Edgar Braendle
Keyword(s):  
Carbonic Anhydrase ◽  
Proximal Tubule ◽  
Carbonic Anhydrase Activity ◽  
Oxalate Transport

RENAL CARBONIC ANHYDRASE IN PREMATURE AND MATURE INFANTS

PEDIATRICS ◽  
1951 ◽  
Vol 7 (2) ◽  
pp. 182-185
Author(s):  
RICHARD DAY ◽  
JANE FRANKLIN
Keyword(s):  
Carbonic Anhydrase ◽  
Premature Infants ◽  
Carbonic Anhydrase Activity ◽  
Renal Carbonic Anhydrase

The carbonic anhydrase activity in the kidneys of premature infants was studied because it was thought that if the renal enzyme is as deficient as that in the blood, inefficiency in acidification of urine might result. In contrast with the blood, postmortem specimens of kidneys of premature infants were found to exhibit carbonic anhydrase activity similar to that found in the case of kidneys from older infants and adults.

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