Mixed sex cercariae from the Puerto Rico isolate of S. mansoni43 (link), released from infected Biomphalaria glabrata snails, were placed in low-melting agarose plugs and genomic DNA prepared by standard methods. Approximately, six-fold coverage of the nuclear genome was obtained using a whole genome shotgun sequencing approach where libraries of different cloned insert sizes (in plasmid, fosmid and BAC vectors) were randomly sequenced by Sanger technology from either end. Sequence reads were assembled and scaffolds were FISH mapped to individual chromosomes where possible (Supplementary Table 2 ). The output of several gene prediction algorithms, trained using 409 manually curated gene structures, were integrated into a single set of gene predictions (v4), which were used for subsequent analyses. Data were accessed via GeneDB (http://www.genedb.org ) and Artemis was used for subsequent manual annotation and curation of a further 958 genes during subsequent analyses (as described previously44 (link)).
Full methods and all associated references are available in the online version of the paper atwww.nature.com/nature .
Further details for additional methods used in this study are provided inSupplementary Information .
Full methods and all associated references are available in the online version of the paper at
Further details for additional methods used in this study are provided in