Longest tau isoform in human brain, most commonly used as the conventional tau.
| Synonym | Reference | Specificity |
| 2N4R | ||
| htau40 | pubmed:19226187 | |
| microtubule-associated protein tau isoform 2 |
| Relation | Identifier | Name |
| has_reference_protein | uniprot:P10636 | TAU_HUMAN |
| is_a | CONSO:CONSO00045 | 4R tau |