排序方式: 共有26条查询结果,搜索用时 15 毫秒
21.
Triterpenoids from the leaves of Psidium guajava 总被引:1,自引:0,他引:1
The resin of Commiphora kwo yielded two new octanordammarane triterpenes namely 15 alpha-hydroxymansumbinone and 28-acetoxy-15 alpha-hydroxymansumbinone, along with the four known compounds, mansumbinone, mansumbinol, (16S, 20R)-dihydroxydammar-24-en-3-one and T-cadinol. These structures were elucidated by spectroscopic techniques, including 1D and 2D NMR spectroscopy, and X-ray analysis. 相似文献
22.
A walk though vertebrate and invertebrate protamines 总被引:9,自引:0,他引:9
An updated comparative analysis of protamines and their corresponding genes is presented, including representative organisms from each of the vertebrate classes and one invertebrate (squid, Loligo opalescens). Special emphasis is placed on the implications for sperm chromatin organization and the evolutionary significance. The review is based on some of the most recent publications in the field and builds upon previously published reviews on this topic. 相似文献
23.
Sabira Naqvi Zafar H. Zaidi Hedvig von Bahr-Lindström Mats Carlquist Hans Jörnvall 《FEBS letters》1983,162(2):290-295
Hemoglobin from the tropic lizard Uromastix hardwickii was isolated. Chain separations were studied, and the whole carboxymethylated globin was cleaved with trypsin. Peptides were pre-fractionated by exclusion chromatography and finally purified by reversed phase high-performance liquid chromatography. Amino acid sequence analysis permitted ordering of peptides in alpha- and beta-chains by homology with known structures in other hemoglobins. Results show large structural variations (about 50% homology between Uromastix and viper alpha-chains) and suggest chain heterogeneity with the presence of at least two types of both the alpha- and beta-chains in the preparations. 相似文献
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Sabira Hachem Anne-Sophie Laurenson Jean-Philippe Hugnot Catherine Legraverend 《BMC developmental biology》2007,7(1):17
Background
In the cerebellum of newborn S100B-EGFP mice, we had previously noted the presence of a large population of S100B-expressing cells, which we assumed to be immature Bergmann glial cells. In the present study, we have drawn on this observation to establish the precise spatio-temporal pattern of S100B gene expression in the embryonic cerebellum. 相似文献26.
Hafeez Sabira Yaqoob Sabba Magray Aqib Rehman Kamili Azra N. Ganai Bashir Ahmad 《International microbiology》2023,26(3):651-662
International Microbiology - Aconitum heterophyllum is a rare perennial herb from Kashmir Himalayas. Due to its threatened status and dependence on its environment, the plant was examined for any... 相似文献