Intergenic spacers located in the cluster of five tRNA genes (WANCY gene region) of two sea snake species (Hydrophis platurus and H. melanocephalus) found off South Korean coastal waters A intergenic spacers located in the WANCY gene region of two sea krait species (Laticauda laticaudata and L. semifasciata), four terrestrial cobras (Bungarus fasciatus, Micrurus fulvius, Naja naja and Sinomicrurus macclellandi) B and two true sea snake species downloaded from GenBank (H. curtus and Emydocephalus ijimae) C intergenic spacer lengths amongst Hydrophiinae species are above the intergenic spacer in the same order as the species are listed. The hypothesised tRNA genes lost due to random deletions are written below the intergenic spacers. The tRNA genes are abbreviated by the corresponding one-letter amino acid codes, such as W, A, N etc.