Volume 35, no. 12, p. 3021–3025, 1997. Page 3021, abstract, line 6; p. 3022, column 2, line 9 from bottom; p. 3023, column 1, line 6; p. 3024, column 2, line 6; and p. 3025, column 1, line 12: “1,179-bp” should read “1,169-bp.”
Page 3022, column 1, lines 27 to 29 from bottom: Should read “… ureC-U (5′-AAG AAG TCA AAA ACG CCC CAA AAC-3′, from positions −383 to −360) and ureC-L (5′-CTT ATC CCC ATG CAC GAT ATT CCC-3′, from positions 763 to 786).”
Page 3022, column 1, line 22 from bottom: “1,179” should read “1,169.”
The experiments presented in the paper were not carried out with the incorrect primer sequences. Therefore, the Results and Discussion sections are not changed by the above correction.