CONTRACTILE VACUOLE
\kəntɹˈakta͡ɪl vˈakjuːˌə͡ʊl], \kəntɹˈaktaɪl vˈakjuːˌəʊl], \k_ə_n_t_ɹ_ˈa_k_t_aɪ_l v_ˈa_k_j_uː_ˌəʊ_l]\
Definitions of CONTRACTILE VACUOLE
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A small spherical vesicle, found in the cytoplasm of many Protista, which appears and disappears with regularity.
By Henderson, I. F.; Henderson, W. D.
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A v. observed in a structureless mass of protoplasm (as in the Endoplastica) which slowly fills with a watery fluid and, after reaching a certain size, contracts to obliteration, the process of distention and contraction being repeated rhythmically, after the manner of a systole and diastole.
By Smith Ely Jelliffe
Word of the day
Proto Oncogene Proteins c erbB 2
- cell surface protein-tyrosine kinase that is found to be overexpressed in significant number adenocarcinomas. It has extensive homology can heterodimerize EGF EPIDERMAL GROWTH FACTOR), 3 receptor (RECEPTOR, 3) and the 4 receptor. Activation of erbB-2 receptor occurs during heterodimer formation with a ligand-bound erbB family members. EC 2.7.11.-.