The Channel of Structuring (23-43) is one of the thirty-six channels of the Human Design bodygraph, a system originated in 1987 by Ra Uru Hu and described here as a modern esoteric framework rather than an ancient tradition. A channel is a defined pathway joining the Throat centre and the Ajna centre, and it is completed by two gates: Gate 23 ("Individual Assimilation") and Gate 43 ("Individual Insight"), whose numbers come from the King Wen sequence of the I Ching. The channel idea and its Tree-of-Life-style pathways, the gates' I Ching numbering, and the centres' chakra roots were combined for the first time in the 1980s; the channel is part of that composite, presented as the system's own model, not as verified fact.
In the system's own account, the Throat centre carries communication and manifestation, the single centre through which every other centre's energy is turned into speech or action, and the Ajna centre carries mental awareness: the forming of concepts and opinions, and the certainty that can harden into fixed ways of thinking; the channel is read as a direct circuit between those two functions whenever both gates are defined in the same chart.
The same two numbers appear elsewhere in this atlas as Gene Keys 23 and 43, Richard Rudd's later, contemplative reading of the identical hexagram pair. Gene Key 23 runs from the Shadow of Complexity through the Gift of Simplicity to the Siddhi of Quintessence; Gene Key 43 runs from Deafness through Insight to Epiphany. Rudd's system drops the bodygraph and its channels entirely, so this particular pairing is a Human Design structure only, with no equivalent in his contemplative method.