STUDIES OF SPERMIOGENESIS IN A NEMATODE, NIPPOSTRONGYLUS BRASILIENSIS
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چکیده
منابع مشابه
Studies of Spermiogenesis in a Nematode, Nippostrongylus Brasiliensis
The fine structure of the developing spermatids and the mature sperm of Nippostrongylus brasiliensis was investigated. Immature spermatids are found at one end of the tubelike testis, and the mature sperm at the other. The spermatid has a prominent nucleus, with the chromatin clumped at the margin. It also contains a pair of centrioles, located near the nucleus. The cytoplasm is filled with rib...
متن کاملMolecular cloning of a cystatin from parasitic intestinal nematode, Nippostrongylus brasiliensis.
A novel member of the cystatin family, nippocystatin (NbCys), was identified from excretory-secretory (ES)-products of a nematode Nippostrongylus brasiliensis, and the cDNA was cloned and sequenced. The mRNA of NbCys was confirmed to be expressed in both larvae and adults of the parasite. NbCys was translated as a proform with a single domain for secretion and was detected as a 14-kDa mature fo...
متن کاملCloning, expression, and properties of a nonneuronal secreted acetylcholinesterase from the parasitic nematode Nippostrongylus brasiliensis.
We have isolated a full-length cDNA encoding an acetylcholinesterase secreted by the nematode parasite Nippostrongylus brasiliensis. The predicted protein is truncated in comparison with acetylcholinesterases from other organisms such that the carboxyl terminus aligns closely to the end of the catalytic domain of the vertebrate enzymes. The residues in the catalytic triad are conserved, as are ...
متن کاملHsp12.6 Expression Is Inducible by Host Immunity in Adult Worms of the Parasitic Nematode Nippostrongylus brasiliensis
Heat shock proteins (Hsp) are a family of stress-inducible molecular chaperones that play multiple roles in a wide variety of animals. However, the roles of Hsps in parasitic nematodes remain largely unknown. To elucidate the roles of Hsps in the survival and longevity of nematodes, particularly at the 2 most critical stages in their lifecycle, the infective-L3 stage and adult stage, which is s...
متن کاملA Cross-Reactive Monoclonal Antibody to Nematode Haemoglobin Enhances Protective Immune Responses to Nippostrongylus brasiliensis
BACKGROUND Nematode secreted haemoglobins have unusually high affinity for oxygen and possess nitric oxide deoxygenase, and catalase activity thought to be important in protection against host immune responses to infection. In this study, we generated a monoclonal antibody (48Eg) against haemoglobin of the nematode Anisakis pegreffii, and aimed to characterize cross-reactivity of 4E8g against h...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 1966
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.31.3.381