A representation of the crystal structure o/ Escherichia coli tecA protein. This 
protein catalyzes DMA strand exchange in general genetic recombination. 
Shown are 12 subunits of the crystal in a-carbon backbone representation, 
with adjacent subunits alternately light and dark blue. A bound ADP molecule 
is represented in orange. 
Figure by Randall Story and Thomas Steitz from research reported in Story, 
R.M., Weber, I.T., and Steitz, T.A. 1992. Nature 555:318-525. 
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