A genomic fragment containing a mutant form of amx in which the CTLD signature sequence (LFR) has been changed into RFG by replacing an aliphatic amino acid side chain by a basic one and the basic R side chain by an aliphatic one.
amxCTLD.MUT rescues amx1
Expression of amxCTLD.MUT rescues the sterility seen in homozygous amx1 mutants.