To link to the content of EndoNet use the EndoNet ID that is given on the detail pages in the format ENX0000, where X is a place holder for the type of the component (e. g. R for receptor or C for anatomical structure). As URL for the linking append this ID to the detail page for this type of component. For an hormone that would be:
http://endonet.bioinf.med.uni-goettingen.de/hormone/ENH00000
It is also possible to use the search of EndoNet to link to the right detail page. The URL should look like
http://endonet.bioinf.med.uni-goettingen.de/search/ENC00000
ARGAEREWE GGWGGAQEE EREREALML KHLQEALGL PAGRGDENP AGTVEGKED WEMEEDQGE EEEEEATPT PSSGPSPSP TPEDIVTYI LGRLAGLDA GLHQLHVRL HALDTRVVE LTQGLRQLR NAAGDTRDA VQALQEAQG RAEREHGRL EGCLKGLRL GHKCFLLSR DFEAQAAAQ ARCTARGGS LAQPADRQQ MEALTRYLR AALAPYNWP VWLGVHDRR AEGLYLFEN GQRVSFFAW HRSPRPELG AQPSASPHP LSPDQPNGG TLENCVAQA SDDGSWWDH DCQRRLYYV CEFPF