The urea cycle involves a series of biochemical steps in which nitrogen, a waste product of protein metabolism, is removed from the blood and converted to urea.

The gas initiated a series of biochemical steps that led to an erection.

Doctors believe that 5-ASA acts directly on the damaged bowel, blocking key biochemical steps in the inflammatory process.

And, finally, transcription of genes isn't the only level at which regulation takes place, as there are lots of biochemical steps between there and a functional protein.

With advances in the fields of molecular biology, biochemistry, genetics, the study of nutrition is increasingly concerned with metabolism and metabolic pathways: the sequences of biochemical steps through which substances in living things change from one form to another.

In the new work, the scientists interfered with the gene that allows parasites to absorb calcium, a critical biochemical step in maturation.

For example, a model of the Wnt pathway he developed in collaboration with the late Reinhart Heinrich showed that new properties and constraints emerge when the individual biochemical steps are combined into a complete pathway.

Their classification by mechanism of action (MOA) indicates the first enzyme, protein, or biochemical step affected in the plant following application.

Their memory of the complicated biochemical steps in the degradation of glucose within the cell afforded little support and even less practical information.

The aerobic energy systems take longer to produce the ATP and reach peak efficiency, and requires many more biochemical steps, but produces significantly more ATP than anaerobic glycolysis.