Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| common name | protein name | divergence from human lineage (MYA) | accession number | sequence length (aa) | sequence identity to human protein |
| --- | --- | --- | --- | --- | --- |
| Tropical Clawed Frog | uncharacterized protein C20orf117-like | 371.2 | XP_002942331.1 | 1584.0 | 39% |
| purple sea urchin | uncharacterized protein LOC578090 | 742.9 | XP_783370.2 | 1587.0 | 47% |
| body louse | Centromeric protein E, putative | 782.7 | XP_002429877.1 | 2086.0 | 30% |
| southern house mosquito | conserved hypothetical protein | 782.7 | XP_001843754.1 | 1878.0 | 32% |
| porkworm | surface antigen repeat family protein | 937.5 | XP_003380263.1 | 2030.0 | 36% |
Question:
What is the accession number of the protein with the common name Purple Sea Urchin?
Answer:
XP_783370.2