The cytochemistry of oocytes of Chinese shrimpPenaeus orientalis |
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Authors: | Chen Qiu |
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Institution: | (1) Liaoning Marine Fisheries Research Institute, 116023 Dalian |
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Abstract: | In the growth of oocytes ofPenaeus orientalis Kishinouye, five stages were distinguished. Histochemical tests showed the presence of DNA in the chromatin and nucleolus
of the cell. The cytoplasm at the previtellogenetic stage and the nucleolus are rich in RNA and the proteins abounding with
cysteine, tyrosine and tryptophan. The yolk consists mainly of proteins and phospholipids. The 1,2-glycol groups of carbohydrate
occur in the cytoplasm at stage II, and aggregate mostly into cortical rods at stages IV and V. Neutral lipid droplets, and
protein containing disulfides, appear in the cytoplasm at stages III and IV respectively. The proteins in the cortical rod
differ from those in other components of the cell in the presence of cystine and absence of arginine. |
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