For one, the cable could only transmit one message at ... to be sent simultaneously both ways over a line; and then the quadruplex, invented by Thomas Edison in 1874, which allowed two messages ...

The pentacyclic acridinium methosulfate salt RHPS4 induces the 3′single-stranded guanine-rich telomeric overhang to fold into a G-quadruplex structure. Stabilisation of the latter is ...