In order to produce the required ATP for contraction, they are able to efficiently metabolise fat, glucose and glycogen aerobically, by having high activities of citrate synthase (CS), 3-hydroxyacyl Co A dehydrogenase (3HAD), but low activities of phosphofructokinase (PFK), lactate dehydrogenase (LDH) and creatine kinase (CK) (Essén-Gustavsson and Henriksson, 1984; Kohn et al., 2007b; Pette, 1985).
The system worked well on a time scale of 3 hours, but the low activity of the sTEVp resulted in insufficient cleavage of the target protein on a shorter time scale (< 20 min).
In specimen taken by gastroduodenoscopy, the morphology of his upper gastrointestinal tract was normal, but a very low activity of lactase was found in the duodenal specimen (because of the small size of the specimen, the laboratory did not give any exact lactase value, but they could not detect any activity) [ 11].
The development of non-precious metal electrocatalysts for renewable energy conversion and storage is compelling but greatly challenging due to low activity of the existing catalysts.
Above 50°C, we observed an apparent lag (up to ∼30 s at 60°C in Fig. 2), but this is due to low activity of the heat-stable ATP regeneration system used at these temperatures, as confirmed by adding ATP to the system.
Kinetic analysis was also carried out for S-mephenytoin 4-hydroxylation, but parameters could not be determined due to low activity of CYP2C93 for this reaction.
Seawater splitting to produce hydrogen and oxygen is compelling but greatly challenging because of the impurity of seawater and the low activity of the existing catalysts.
People with vitiligo (vit-uh-LYE-go) have low activity of catalase, an enzyme that breaks down hydrogen peroxide, resulting in elevated levels of hydrogen peroxide in the skin.
Low activity of an enzyme may result in the subsequent accumulation of the enzyme's substrate, which may be toxic at high levels.
