SGN_gene 4360 sus2 PO:0007010 PMID:16926239 IEP NCBI_gi:115310619 G sucrose synthase 2 SS2 gene taxon:13442 20100416 SGN SGN_gene 4367 sus1 PO:0007010 PMID:16926239 IEP NCBI_gi:115310617 G sucrose synthase 1 CaSUS1|SS1 gene taxon:13442 20100416 SGN