其实两个人的研究除了所用的手段不同外,也是不同的基因,大Yan他们研究的是UhpT,而小Yan研究的是XylE。 小Yan在她的第一篇《自然》杂志的文章“Crystal structure of a bacterial homologue of glucose transporters GLUT1–4”里很完整地对前人在同一个基因上的文章进行了引述,一起来看看关键的写研究目的和主要发现的一段:
" To elucidate the structure and molecular mechanism of GLUT1–4, we launched a systematic effort to screen for well-behaved GLUT1–4 protein variants as well as their homologues. Among the tested proteins, the E. coliD-xylose:H+ symporter XylE29,30,31,32,33 showed excellent solution behaviour. XylE, an archetypal member of the SP subfamily19,32, shares sequence identities of 29%, 30%, 29% and 27%, and similarities of 49%, 51%, 48% and 47%, with GLUT1, GLUT2, GLUT3 and GLUT4, respectively (Supplementary Fig. 1). Here we report the crystal structures of XylE bound separately to three different ligands: D-xylose, D-glucose and 6-bromo-6-deoxy-D-glucose (6-BrGlc). We also performed an extensive, structure-guided, in vivo and in vitrofunctional analysis of XylE. These studies reveal significant insights into the structure and function of XylE and its human homologues GLUT1–4."
单单这一段就引用了前人的六篇文章,主要是来自 Henderson, P. J的实验室研究同一个基因的一些奠基性文章。从这个来看,小Yan不仅是科研做的严谨,论文的背景铺设也很全面,很有逻辑性,而且,该引经注典的地方也都做得很好,她没有引用大Yan的文章是两人研究的不是同一个基因而已,通俗一点就是大Yan吃的是苹果,小Yan吃得是橙子。因此,她可能觉得没有必要去引用大Yan的文章,就是说她没有设法去埋没大Yan在这方面的贡献。
19. Henderson, P. J. & Maiden, M. C. Homologous sugar transport proteins in Escherichia coli and their relatives in both prokaryotes and eukaryotes. Phil. Trans. R. Soc. Lond. B 326, 391–410 (1990).
29. Lam, V. M., Daruwalla, K. R., Henderson, P. J. & Jones-Mortimer, M. C. Proton-linked D-xylose transport in Escherichia coli. J. Bacteriol. 143, 396–402 (1980).
30. Davis, E. O., Jones-Mortimer, M. C. & Henderson, P. J. Location of a structural gene for xylose–H1 symport at 91min on the linkage map of Escherichia coli K12. J. Biol. Chem. 259, 1520–1525 (1984).
31. Davis, E. O. & Henderson, P. J. The cloning and DNA sequence of the gene xylE for xylose–proton symport in Escherichia coli K12. J. Biol. Chem. 262, 13928–13932 (1987).
32. Maiden, M. C., Davis, E. O., Baldwin, S. A., Moore, D. C. & Henderson, P. J. Mammalian and bacterial sugar transport proteins are homologous. Nature 325, 641–643 (1987).
33. Henderson, P. J. Proton-linked sugar transport systems in bacteria. J. Bioenerg. Biomembr. 22, 525–569 (1990).)