Growing degree-day. Growing degree days (GDD), also called growing degree units (GDUs), are a heuristic tool in phenology. GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates such as the date that a flower will bloom, an insect will emerge from dormancy, or a crop will reach maturity.
Cystic fibrosis is a genetic condition caused by a faulty gene (known as the CFTR gene). The CFTR gene normally creates a protein that moves salt and water out of a cell.If the CFTR gene is defective, it results in a build-up of thick, sticky mucus in the body's tubes and passageways.ystic fibrosis is a genetic condition caused by a faulty gene (known as the CFTR gene). The CFTR gene normally creates a protein that moves salt and water out of a cell.
1 Deletion of Phe508 in cystic fibrosis transmembrane conductance regulator causes cystic fibrosis; only coexpression with wild-type N-half promotes maturation of C-half of CFTR. 2  Genetic mutations may be grouped by class (I-VI) and are related to quantity of CFTR protein produced. The frameshift mutation 3905insT is one of the most common CFTR mutations in the Swiss population with cystic fibrosis. 2  Structure and dynamics of NBD1 from CFTR. 3  These results suggest the possibility of an interaction between CFTR and the TJ protein complex, probably via the cytoskeleton.