Return the value of taxon_id if it defined (ie even if it is 0 as it is in the case of ancestral sequences)
Return the value of taxon_id if it defined (ie even if it is 0 as it is in the case of ancestral sequences)

danstaines/ensembl-compara,kumarsaurabh20/ensembl-compara,dbolser-ebi/ensembl-compara,etapanari/ensembl-compara,etapanari/ensembl-compara,Ensembl/ensembl-compara,danstaines/ensembl-compara,dbolser-ebi/ensembl-compara,etapanari/ensembl-compara,Ensembl/ensembl-compara,kumarsaurabh20/ensembl-compara,ckongEbi/ensembl-compara,Ensembl/ensembl-compara,danstaines/ensembl-compara,Ensembl/ensembl-compara,danstaines/ensembl-compara,etapanari/ensembl-compara,danstaines/ensembl-compara,Ensembl/ensembl-compara,ckongEbi/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,ckongEbi/ensembl-compara,dbolser-ebi/ensembl-compara,Ensembl/ensembl-compara,kumarsaurabh20/ensembl-compara,kumarsaurabh20/ensembl-compara