Diacylglycerol

Diacylglycerol
glycerol substituted on the 1 and 2 hydroxyl groups with long chain fatty acyl residues. Dag is a normal intermediate in the biosynthesis of phosphatidyl phospholipids and is released from them by phospholipase c activity. Dag from phosphatidyl inositol polyphosphates is important in signal transduction. Elevated levels of dag in membranes activate protein kinase c by stabilising its catalytically active complex with membrane bound phosphatidyl serine and calcium.

Water in Plants

The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

The Human Physiology

Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

The Homo Species

The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

Population Regulation in an Ecosystem

With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..

"Cronopio dentiacutus", a prehistoric mammal (an illustration)

Mammalian Ancestors

Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Ov..

Lotic Communities & Algae

Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..