Ren Z, Jin H, Whitby P W, Morton D J, Stull T L
Departments of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, USA.
J Bacteriol. 1999 Sep;181(18):5865-70. doi: 10.1128/JB.181.18.5865-5870.1999.
Haemophilus influenzae utilizes hemoglobin and hemoglobin-haptoglobin as heme sources. The H. influenzae hemoglobin- and hemoglobin-haptoglobin binding protein genes, hgpA, hgpB, and hgpC, contain lengths of tetrameric CCAA repeats. Using an hgpA-lacZ translational gene fusion, we demonstrate phase-variable expression of lacZ associated with alteration in the length of the CCAA repeat region.
流感嗜血杆菌利用血红蛋白和血红蛋白-触珠蛋白作为血红素来源。流感嗜血杆菌的血红蛋白和血红蛋白-触珠蛋白结合蛋白基因hgpA、hgpB和hgpC含有四聚体CCAA重复序列。利用hgpA-lacZ翻译基因融合,我们证明了与CCAA重复区域长度改变相关的lacZ的相变表达。