404. That’s an error.
The requested URL /bookmarks/mark?op=add&bkmk=http%3A//biorxiv.org/content/early/2016/11/22/065698&title=Dissection%20of%20the%20contribution%20of%20regulation%20mode%20to%20the%20properties%20of%20feedforward%20and%20feedback%20gene%20regulatory%20motifs.
was not found on this server. That’s all we know.