全文获取类型
收费全文 | 55篇 |
免费 | 8篇 |
国内免费 | 2篇 |
出版年
2017年 | 1篇 |
2014年 | 1篇 |
2013年 | 3篇 |
2011年 | 5篇 |
2010年 | 5篇 |
2008年 | 2篇 |
2007年 | 2篇 |
2006年 | 1篇 |
2004年 | 1篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 5篇 |
1998年 | 2篇 |
1995年 | 1篇 |
1992年 | 4篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1987年 | 2篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1980年 | 3篇 |
1977年 | 1篇 |
1974年 | 1篇 |
1971年 | 2篇 |
1966年 | 3篇 |
排序方式: 共有65条查询结果,搜索用时 15 毫秒
61.
The molecular organization of the beta-globin complex of the deer mouse, Peromyscus maniculatus 总被引:1,自引:0,他引:1
Padgett RW; Loeb DD; Snyder LR; Edgell MH; Hutchison CA d 《Molecular biology and evolution》1987,4(1):30-45
Recombinant DNA clones have been isolated that contain 80 kb of the
beta-globin complex from the deer mouse, Peromyscus maniculatus.
Comparisons of this complex with that from the laboratory mouse, Mus
domesticus (with an order 5'-Hbby, Hbb-bhO, Hbb-bhl, Hbb-bh2, Hbb-bh3,
Hbb-bl, Hbb-b2 3') highlight organizational trends in the beta-globin
complex since the two species diverged. Unlike other mammals studied thus
far, the deer mouse possesses three adult genes. Partial sequence analysis
indicates that each of the three adult genes is intact and hence may be
functional. Hybridization of one of the two Mus pseudogenes, Hbb-bh3, to
genomic blots from Peromyscus reveals that it has a homologous counterpart
in Peromyscus. Homologous genes to the two gamma-like Mus genes, Hbb-bhO
and Hbb-bhl, are also found in Peromyscus. The strong hybridization between
the Hbb-bhl genes and significant nucleotide similarity between the Hbb-bhO
genes suggest that both pairs are important for the ontogeny of these mice
although no known product has been identified for the Hbb-bhO genes. The
presence of Hbb-bhO and Hbb-bhl in Peromyscus suggests that the duplication
that created this related gene set occurred before the two lineages
diverged. A single gene for Hbb-y has been isolated from Peromyscus. The
adult region in Peromyscus has undergone significant divergence from the
same region in Mus, having three rather than two adult genes, the
acquisition of at least 15 kb of extra DNA relative to Mus, and possibly
the loss of the Hbb-bh2 pseudogene. The nonadult region of the complex, in
contrast, contains the same set of genes apparently distributed over the
same amount of DNA as in the Mus beta- globin complex. This observation
suggests that the embryonic region of the complex is more evolutionarily
stable than the adult region.
相似文献
62.
Robert P. Adams Ernst Von Rudloff Lawrence Hogge 《Biochemical Systematics and Ecology》1983,11(3):189-193
Six taxa of western North American denticulate leaved junipers were collected and their volatile leaf oils analysed. Two chemical forms of J. californica (‘A’ and ‘B’) previously reported were found to differ considerably in their concentration of α-pinene, sabinene, β-pinene, camphor and 4-terpineol. However, principal co-ordinate analysis revealed that the chemical forms of J. californica were the most similar taxa in the group and considerably more similar than the two varieties of J. occidentalis are to each other. This group of junipers appears to consist of two major subgroups: (1) J. occidentalis; and (2) J. california, J. monosperma, J. osteosperma; with J. osteosperma being closely related to the northern form of J. californica (:A.) and J. monosperma being most closely related to the southern form of J. californica (‘B’). 相似文献
63.
E Barreto-Bergter A B Vermelho L Hogge P A Gorin 《Comparative biochemistry and physiology. B, Comparative biochemistry》1985,80(3):543-545
Glycosphingolipids were isolated from a lipid extract of epimastigote forms of Trypanosoma cruzi via Florisil and silicic acid column chromatography. The carbohydrate components of neutral glycolipid consisted of mannose and galactose in a ratio of 1:2. The fatty acids of the glycolipid were analyzed by gas liquid chromatography-mass spectrometry (g.l.c.-m.s.). Normal and 2-hydroxy fatty acids were found. The sphingosine bases were C18 dihydrosphingosine and 17-methyl sphingosine. 相似文献
64.
Sharon LR Simon Lise Lamoureux Margot Plews Michael Stobart Jillian LeMaistre Ute Ziegler Catherine Graham Stefanie Czub Martin Groschup J David Knox 《Proteome science》2008,6(1):23
Background
The bovine spongiform encephalopathy (BSE) epidemic and the emergence of a new human variant of Creutzfeldt-Jakob Disease (vCJD) have led to profound changes in the production and trade of agricultural goods. The rapid tests currently approved for BSE monitoring in slaughtered cattle are all based on the detection of the disease related isoform of the prion protein, PrPd, in brain tissue and consequently are only suitable for post-mortem diagnosis. Objectives: In instances such as assessing the health of breeding stock for export purposes where post-mortem testing is not an option, there is a demand for an ante-mortem test based on a matrix or body fluid that would permit easy access and repeated sampling. Urine and urine based analyses would meet these requirements. 相似文献65.