genetic markers: how to read them? - (Aug/30/2006 )

looking at the E-coli genome make my head explode. now i recognize some of the markers like recA, lacZ etc.....but still very confusing for me. please is there any source of information how to read them and what does each one do? thanx a lot

try this( page 18)

http://www.bio.indiana.edu/~ybelab/procedu...gami%20cells%22