Individual Journal Week 11

Terms

• Batch-culture: A large-scale closed system culture in which cells are grown in a fixed volume of nutrient culture medium under specific environmental conditions (e.g. nutrient type, temperature, pressure, aeration, etc.) up to a certain density in a tank or airlift fermentor, harvested and processed as a batch, especially before all nutrients are used up. [1]
• Catabolite: product of catabolism, the breakdown of complex molecules into simpler ones. [2]
• Gene Regulatory Protein: Any protein that interacts with dna sequences of a gene and controls its transcription. [3]
• Up-regulation:process that increases ligand/receptor interactions due to an increase in the number of available receptors. [4]
• Down-regluation: the process that decreases ligand and receptor interactions or reduces the responsiveness of a cell to a stimulus following first exposure.This is often accompanied by an initial decrease in affinity of receptors for the agent and a subsequent reduction in the number of available receptors expressed on the surface which can result from internalisation of the ligand:receptor complex or from decreased expression of the receptor. [5]
• Motif: The smallest group of atoms in a polymer that, when under the influence of a rotation-translation operator, will assemble the rest of the atoms in the chain. [6]
• Desaturase: Any of several enzymes that putdouble bonds into the hydrocarbon areasof fatty acids. [7]
• Biogenesis: The process in which life forms arise from similar life forms. [8]
• Trehalose: a crystalline disaccharide C12H22O11 that is found in various organisms (as fungi and insects), is about half as sweet as sucrose, and is sometimes used as a sweetener in commercially prepared foods [9]
• Transcriptome: the complement of mature messenger RNAs produced in a given cell in a given moment of its life. [10]