Table 3. The most highly expressed proteins in the echidna transcriptome as annotated by platypus Ensembl proteins.
| Transcript reference number | Platypus Ensembl accession | Gene name | Description | RPKM |
| 968 | ENSOANG00000011369 | BCHE | butyrylcholinesterase | 604 |
| 8337 | ENSOANG00000005594 | SLC25A3 | solute carrier family 25 (mitochondrial carrier) | 441 |
| 1723 | ENSOANG00000009799 | CALR | calreticulin | 433 |
| 15082 | ENSOANG00000012964 | EEF1B2 | eukaryotic translation elongation factor 1 beta 2 | 421 |
| 1219 | ENSOANG00000013689 | – | – | 400 |
| 1766 | ENSOANG00000003422 | LTV1 | unknown function | 378 |
| 656 | ENSOANG00000011189 | RPS27A | ribosomal protein S27a | 376 |
| 6048 | ENSOANG00000000439 | – | – | 371 |
| 3603 | ENSOANG00000010996 | PDCD10 | programmed cell death 10 | 367 |
| 871 | ENSOANG00000008043 | – | – | 366 |