We report the cloning and characterization of the genomic sequence of
the actin (Act)-encoding gene (net) from Leishmania major. Restriction
maps of two genomic clones, as well as genomic Southern analysis stro
ngly suggest that the net of L. major is a single-copy gene. A single
1.6-kb transcript is detected in Northern blots. The deduced aminoacid
sequence shows 68-89% identity with Act sequences from other eukaryot
es.