Unpaired Ultimobranchial Glands of the African Lungfish, Protopterus dolloi.

نویسندگان

  • Y Shinohara-Ohtani
  • Y Sasayama
چکیده

The ultimobranchial glands of juvenile African lungfish (Protopterus dolloi) (14 individuals; total body length 25-205 mm) were immunohistochemically examined. In individuals larger than 36 mm, one ultimobranchial gland was close to the left afferent branchial arteries. The topography of the ultimobranchial gland was similar to that of salamanders and sharks, but not to teleosts. With body growth, the ultimobranchial gland was vascularized and the parenchymal cells were gradually immunostained with anti-calcitonin antibody. In all individuals examined, the ultimobranchial gland existed only on the left side of the pharynx. These observations are discussed from a phylogenetic viewpoint.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Discovery of J Chain in African Lungfish (Protopterus dolloi, Sarcopterygii) Using High Throughput Transcriptome Sequencing: Implications in Mucosal Immunity

J chain is a small polypeptide responsible for immunoglobulin (Ig) polymerization and transport of Igs across mucosal surfaces in higher vertebrates. We identified a J chain in dipnoid fish, the African lungfish (Protopterus dolloi) by high throughput sequencing of the transcriptome. P. dolloi J chain is 161 aa long and contains six of the eight Cys residues present in mammalian J chain. Phylog...

متن کامل

The complete nucleotide sequence of the mitochondrial genome of the lungfish (Protopterus dolloi) supports its phylogenetic position as a close relative of land vertebrates.

The complete DNA sequence (16,646 bp) of the mitochondrial genome of the African lungfish, Protopterus dolloi, was determined. The evolutionary position of lungfish as possibly the closest living relative among fish of land vertebrates made its mitochondrial DNA sequence particularly interesting. Its mitochondrial gene order conforms to the consensus vertebrate gene order. Several sequence moti...

متن کامل

An investigation of the role of carbonic anhydrase in aquatic and aerial gas transfer in the African lungfish Protopterus dolloi.

Experiments were performed on bimodally breathing African lungfish Protopterus dolloi to examine the effects of inhibition of extracellular vs total (extracellular and intracellular) carbonic anhydrase (CA) activity on pulmonary and branchial/cutaneous gas transfer. In contrast to previous studies on Protopterus, which showed that the vast majority of CO(2) is excreted into the water through th...

متن کامل

Urea synthesis in the African lungfish Protopterus dolloi--hepatic carbamoyl phosphate synthetase III and glutamine synthetase are upregulated by 6 days of aerial exposure.

Like the marine ray Taeniura lymma, the African lungfish Protopterus dolloi possesses carbamoyl phosphate III (CPS III) in the liver and not carbamoyl phosphate I (CPS I), as in the mouse Mus musculus or as in other African lungfish reported elsewhere. However, similar to other African lungfish and tetrapods, hepatic arginase of P. dolloi is present mainly in the cytosol. Glutamine synthetase a...

متن کامل

Heart and circulation of the African lungfish.

Cardiovascular structure and function were studied in the African lungfish, Protopterus aethiopicus, by a combination of anatomical and physiological techniques. Particular emphasis was placed on mechanisms which operate under natural conditions in which air-breathing alternates with waterbreathing. For such studies, awake, unrestrained fish were used after implanting devices for measuring bloo...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Zoological science

دوره 15 4  شماره 

صفحات  -

تاریخ انتشار 1998