As a rule the required sequence listing will be available to the EPO if it was contained in the international application under
Rule 5.2 PCT or filed under
Rule 13ter PCT with the EPO acting as ISA/SISA or IPEA (see
points 153 ff). Further, it will also be accessible to the EPO if it is made available by WIPO on Patentscope and can be downloaded in a usable form.