Institute of Molecular Plant Sciences, Leiden University, Clusius Laboratory, The Netherlands.
Part of the open reading frame of uidA, encoding beta-glucuronidase, was sequenced and two differences were found with the previously reported nucleotide sequence [Jefferson et al., Proc. Natl. Acad. Sci. USA 83 (1986) 8447-8451]. One is a silent mutation, the other results in the Glu279-->Gln substitution.