They did not undergo gastric operation or endoscopic treatment previously and were confirmed having disorder of epithelium structure or heterocyst
, including dysplasia and carcinoma in situ, by gastroscopy or postoperative histopathological examination.
To study the morphology of cyanobacteria, cell shape, width, color, motility and presence/absence of hormogonial cell, sheath and heterocyst
The result showed psammoma bodies and some heterocyst
. We considered it as micropapillary carcinomas.
Several studies depicted that B is involved in increasing the absorption of N through fixation in heterocyst
Although the ability of some cyanobacteria in fixing [N.sub.2], none Cyanophyta detected in this work presented heterocyst
Heterocystscylindric, intercalary, 5-7 [micro]m in diameter and 7-20 [micro]m long, akinetes elongate, cylindric, solitary formed near the middle of the trichome but not adjacent to the heterocyst
, 6-8 [micro]m in diameter and 20-60 [micro]m long (Fig.
Ohmori, "NrrA, a nitrogen-responsive response regulator facilitates heterocyst
development in the cyanobacterium Anabaena sp.
glycolipids in cultures and environmental samples: Diversity and biomarker potential.
Cyanobacteria are morphologically diverse and they consist of unicellular, colonial, pseudofilamentous, pseudoparenchymatous uniseriate, filamentous forms unbranched, undifferentiated, differentiated with specialized cells called heterocyst
and akinetes and heterotrichous branched forms .
Most of the cyanobionts appear to be heterocystous which is as close to a multicellular organisation as is possible in these bacteria in which hexose, produced by photosynthesis, moves from the vegetative cells to the heterocyst
(Meeks & Elhai, 2002).
In cultures of the two-membered assemblage, 10 to 50 epibiotic cells were attached to each heterocyst
However, the heterocystous cyanobacteria have an 11 kb insertion element present within the coding region of nifD, which is excised by site specific recombination during heterocyst