Genomic fragment including the sd gene, from BAC clone CH321-04K12. A sfGFP-Tag:FLAG-Tag:CS(PSP)-Tag:CS(TEVp)-Tag:BLRP tag cassette has been introduced at the C-terminal end of the sd gene, such that protein isoforms A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T and U are tagged.