Is it an Ensembl gene/transcript/protein ID?
See also
Other scibio detectors:
is_asin(),
is_bibcode(),
is_icd10_code(),
is_icd9_code(),
is_snp_id(),
is_uniprot_id()
Examples
is_ensembl_id(c("ENSG00000139618", "ENSMUSG00000102659", NA))
#> [1] TRUE TRUE NA