Chara myosin is plant myosin responsible for cytoplasmic streaming and moves actin filaments at 60 µm/s, which is the fastest of all myosins examined. The neck of the myosin molecule has usually mechanical and regulatory roles. The neck of Chara myosin is supposed to bind six light chains, but, at present, we have no knowledge about them. We found Ca⁺⁺-calmodulin activated Chara myosin motility...

Aim: The present investigation was undertaken to establish anatomical norms on gross anatomical, histomorphological and histochemical parameters of infundibulum of Pati and Chara-Chemballi ducks. Materials and Methods: In the present investigation, 12 (twelve) each Pati and Chara-Chemballi ducks in their laying period (42 weeks age) were utilized. Results: The mean length, breadth, thickness an...

Calcification by charophytes improves the quality of water, although most studies on calcification have only examined ecorticate species. We investigated the formation and relationship of alkalines and acids with regard to calcification on internodal cells in Chara corallina, an ecorticate species, and Chara globularis, a corticate species. We observed that alkaline and acidic areas with distin...

Cytoplasmic streaming in characean algae is thought to be generated by interaction between subcortical actin bundles and endoplasmic myosin. Most of the existing evidence supporting this hypothesis is of a structural rather than functional nature. To obtain evidence bearing on the possible function of actin and myosin in streaming, we used perfusion techniques to introduce a number of contracti...

Most myosins have a positively charged loop 2 with a cluster of lysine residues that bind to the negatively charged N-terminal segment of actin. However, the net charge of loop 2 of very fast Chara myosin is zero and there is no lysine cluster in it. In contrast, Chara myosin has a highly positively charged loop 3. To elucidate the role of these unique surface loops of Chara myosin in its high ...

Christine Galante is an associate pro f e s s o r of nursing in the School of Health Pro f e ssions at Marymount Un v i e r s i ty in Arl i n gton, Va . p atients and families, nurses, and s y s t e m s . One of the goals of our m a s t e r ’s pro g ram is for gra d u ates to successfully complete AAC N ’s CCNS c e rt i f i c ation examination; there f o re , the revised courses include informa...

The present investigation was undertaken to establish anatomical norms on gross anatomical, histological and histochemical parameter of ovary of Pati and Chara-Chemballi ducks. In present investigation, twelve each Pati and Chara-Chemballi ducks in their laying periods at 42 weeks of age were utilized. After collection of sample, it was processed as per slandered method. The mean value of lengt...

The distribution of nitrogenase activity in the rice-soil system and the possible contribution of epiphytic cyanobacteria on rice plants and other macrophytes to this activity were studied in two locations in the rice fields of Valencia, Spain, in two consecutive crop seasons. The largest proportion of photodependent N(2) fixation was associated with the macrophyte Chara vulgaris in both years ...

The aquatic gastropod mollusc, Pyrgophorus coronatus, may perform an important role in the transmission of an emergent ocular pathology among fishes in Lake Apoyo, Nicaragua. This disease emerged after an introduction of tilapia (Oreochromis niloticus) and the subsequent loss of Chara sp. beds in the lake. We compared the mollusc population densities in three habitats (sandy/muddy substrates, r...

U. BECKMANN§, G. WEIGELT§ and M. SHURE¶ ∗The CHARA Array, Georgia State University Mount Wilson Observatory, CA 90123, USA †National Optical Astronomy Observatory P. O. Box 26732, Tucson, AZ 85726-6732 ‡Center for High Angular Resolution Astronomy Georgia State University, P. O. Box 3969, Atlanta, GA 30302-3969 §Max Planck Institute for Radio Astronomy Auf dem Hügel 69, Bonn, Germany ¶Exelis — ...