+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Electron microscope study of the endoplasmic reticulum in the muscle fibers of crabs

, : Electron microscope study of the endoplasmic reticulum in the muscle fibers of crabs. Univ Sao Paulo Fac Filos Cienc E Letras Bol Zool 23: 141-169

Ultrafine sections of muscle from the buccal parts of 2 species of crabs were examined with the electron microscope. The principal characteristics of the structure of the muscle fibers are described, with a particular emphasis on the endoplasmic reticulum. It is made up of a network of membranes located within the interior of muscular "colonnettes" [ little columns], in the interfibrillary sarcoplasm. In each sarcomere, the reticulum is divided into 3 regions of different morphology: opposite I zone and distal A zone, the reticulum is formed of a double membrane forming a kind of cuff around each myofibril, opposite the proximal A zone, it consists of tubules and vesicles with a longitudinal orientation and shows a transverse discontinuity, and opposite band H, which is formed by 3 contiguous double membranes, the reticulum seems to have both transvers and longitudinal discontinuity. These data are discussed in relation to current hypotheses as to the probable role of the endoplasmic reticulum in striated muscle.


Other references

Fox D.A.; Miller J.L.; Litman B.J., 1986: Phosphodiesterase activation by phosphorylated rhodopsin in greatly reduced even in the absence of 48 kilodalton protein. Investigative Ophthalmology & Visual Science 27(3 SUPPL): 217

Brzez, G., 1982: Benedykt Dybowski and Josef Nusbaum-Hilarowicz as the pioneers of Darwinian evolutionism in Poland. Przeglad Zoologiczny, 261: 19-35

Fischl, R., 2005: A liver transplant: the gift of life. Connecticut Medicine 69(10): 635-636

James C.H.wer; Gregory C.C.pley; Jennifer M.K.O.Keefe; Judith M.H.wer, 2012: The further adventures of Tin Man Vertical temperature gradients at the Lotts Creek coal mine fire, Perry County, Kentucky. The Lotts Creek coal mine fire developed in an abandoned underground and surface mine in the Hindman (Hazard No. 9) coalbed in the Hazard North 7 -minute quadrangle. In a study conducted in April and May, 212, an array of five thermocouples, with...

Bjork G.R.; Bystrom A.S.; Ericsson J.U.; Hagervall T.G.; Wikstrom P.M., 1989: Methylated nucleosides next to the anticodon influence the efficiency of the transfer rna or are involved in the reading frame maintenance. Journal of Cellular Biochemistry Supplement (13 PART D): 202

Van Den Anker Lugtenburg, P.J.; Krenning, E.P.; Oei, H.Y.; Gerrits, C.J.H.; Vanhagen, P.M.; Reubi, J.C.; Lamberts, S.W.J.; Lowenberg, B., 1994: The role of somatostatin receptor scintigraphy in the initial staging of malignant lymphoma. Journal of Nuclear Medicine 35(5 SUPPL ): 132P

Naot, D.; Callon, K.E.; Grey, A.; Cooper, G.J.; Reid, I.R.; Cornish, J., 2001: A potential role for adrenomedullin as a local regulator of bone growth. Bone remodeling is a complex process of coordinated resorption and formation of bone, which is regulated by systemic hormones and by local factors. We have previously shown that the peptide hormone adrenomedullin is mitogenic to osteoblastic cells...

Gurbanaliev, I.G.; Gadzhiev, S.M., 1985: Intrathoracic complications of hepatic hydatidosis. Of 115 patients with hepatic hydatidosis treated (in USSR), 15 (13%) had intrathoracic complications; biliary-bronchial fistulae observed in 7 patients, demanded urgent surgery without further diagnostic signs than the presence of bile and/or pus...

Snow, R., 1940: A hormone for correlative inhibition. In pea plants inhibition from a shoot apex can travel up a decapitated side shoot, and can then pass across a graft into another shoot, even before the tissues at the graft unite. The inhibiting influence, which is probably secondary and distinct...

D.A.S.mofalova; P.A.K.rpov; A.Y. Nuporko; Ya. B.B.ume, 2011: Reconstruction of the spatial structure of plant phosphatases types 1 and 2A in complexes with okadaic acid. Homology modeling based on the known spatial structures of <i>Homo sapiens</i> protein phosphatases types 1 and 2A was implemented. The spatial structures of human protein phosphatases and their plant homologs from <i>Arabidopsis...