Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:2.5.1.61 (porphobilinogen deaminase)
 637 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Porphobilinogen deaminase activity was studied in the erythrocytes of 73 women and 35 men with various malignant proliferative disorders of the lymphatic system and bone marrow, and, for comparison, in the erythrocytes of 34 women and 14 men with non malignant diseases of the haemopoietic system, and in those of 20 healthy women and 20 healthy men. The activity of the enzyme was determined by the Hsiao et al. method, using porphobilinogen as a substrate. Statistical analysis showed a significant decrease of porphobilinogen deaminase activity in the erythrocytes of men with Hodgkin's disease and women with plasmocytoma and with myeloblastic leukemia; an increased activity of the studied enzyme was found only in men with lymphocytic leukemia.
Patol Pol 1993
PMID:Porphobilinogen deaminase activity in malignant proliferative disorders of the lymphatic system and bone marrow. 848 77

Use of an imported external standard curve is common in real-time quantitative RT-PCR. Two practical strategies for long-term experiments include importing a grand mean standard curve to all accumulated runs or using daily imported standard curves, fixing the slope at the beginning of the experiment and calibrating successive runs with curves generated from this imported slope, adding a single standard that registers the variation in the y-intercept. This study determines the influence that a change in reagent lots has on these two calibration approaches when determining mRNA copy numbers of the ornithine decarboxylase and porphobilinogen deaminase genes. Two sets of determinations were run with the use of lot A and lot B. A marked decrease in the crossing points (Cp) in the standards for both genes at all concentration levels was observed with the change in lots. A grand mean standard curve was generated for each gene and each set and comparisons between the sets were performed. Statistically significant differences were found with respect to the y-intercept but not the slope, suggesting that the change of reagent lot affected the detection sensitivity but not the efficiency of the reaction. The excellent correlation coefficients obtained for these curves for each gene were not achieved when overall data from both sets were combined to generate an overall grand mean standard curve. We conclude that when faced with a change of RT-PCR reagent lot that will affect the detection sensitivity of the method, samples should be calculated with either the daily imported standard curves or with the respective grand mean standard curve for each lot.
Acta Biochim Pol 2005
PMID:Influence of reagent formulation on mRNA quantification by RT-PCR using imported external standard curves. 1602 61