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The Material-Independent Signatures of Life.Forensic Tools of Astrobiology
Biological life is intimately related to the geochemical conditions on Earth and is fit for this planet’s energy flux. It has often been suggested...
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The Early History of Bioenergy
Energy is most commonly defined as the potential to do work. The maintenance of the living state requires a constant flow of energy through the...
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Assembling the Early Puzzle of Life
So far no theory, no approach, no set of formulas, and no blackboard scheme have been found satisfactory in explaining the origin of life. The...
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12 Baker’s Yeast: a rising foundation for eukaryotic sphingolipid-mediated cell signaling
Saccharomyces cerevisiae has been an invaluable tool for the dissection of sphingolipid metabolic pathways and cloning of enzymes involved in...
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1 Phospholipid synthesis in mammalian cells
Phospholipids are the main components of biological membranes and as such act as the major permeability barrier between cells and the extracellular...
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2 Phospholipid synthesis and dynamics in plant cells
Phospholipids represent the second family of lipids after the galactolipids in photosynthetic tissues and the first in non-photosynthetic tissues....
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The Early History of Bio-Information
In a general sense, the information level of a structure equals the minimum number of instructions needed to specify the structure (Orgel 1973). The...
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Modeling Calcium Waves
We present an introduction to the mathematics of calcium waves, both intracellular and intercellular. After a discussion of the earlier models I...
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Regulation of IP 3 Receptors by IP 3 and Ca 2+
Inositol 1,4,5-trisphosphate ( IP 3) receptors are intracellular Ca 2+ channels that mediate release of Ca 2+ from intracellular stores. The channels...
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Hormone-Mediated Intercellular Calcium Signalling in an Insect Salivary Gland – Pathways and Mechanisms
The salivary glands of the blowfly Calliphora vicina are a favourable preparation for investigations into spatio-temporal Ca 2+ dynamics in an intact...
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From Simple to Complex Ca 2+ Oscillations: Regulatory Mechanisms and Theoretical Models
Intracellular Ca 2+ oscillations most often appear as regular spikes. However, complex Ca 2+ oscillations in the form of bursting or chaos have also...
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11 Plant sphingolipids
Plants contain a multiplicity of sphingolipid metabolites, such as long-chain bases, long-chain base phosphates, ceramides, glycosylceramides,...
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5 Sterol metabolism and functions in higher plants
Higher plants synthesize a bewildering array of sterols, with sitosterol, stigmasterol, and 24-methylcholesterol as major compounds. All plant...
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6 Sterol biochemistry and regulation in the yeast Saccharomyces cerevisiae
Saccharomyces cerevisiae has been a major model system for the study of sterol biosynthesis and function. All of the genes encoding the enzymes...
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7 Mammalian ACAT and DGAT2 gene families
Mammalian isozymes of ACAT, DGAT, and MGAT are encoded by the ACAT and DGAT2 gene families. These enzymes catalyze the synthesis of neutral lipid...
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Aging and mitochondrial dysfunction in the filamentous fungus Podospora anserina
In the filamentous fungus Podospora anserina, mitochondria play a paramount role in life span control and aging. During aging, these organelles...
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The human Werner Syndrome as a model system for aging
The aging process is one of the most challenging biological pathways to understand. Applications of model systems for aging have contributed...
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Aging and the programmed death phenomena
Biochemical mechanisms of the programmed death phenomena are considered at levels of unicellular organisms, mitochondria, cells, groups of cells, and...
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Cholera toxin: mechanisms of entry into host cells
Cholera toxin moves from the plasma membrane to the ER of host cells to cause disease. Trafficking in this pathway depends on toxin binding to...
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The Ustilago maydis killer toxins
Killer toxins are small proteins secreted by a number of fungi that are lethal to susceptible cells (generally fungi of the same or related species)....