5 um diam, twisted, with globose enlargement (mostly at the end of hyphae), rarely septate; advancing zone septate, with short branches, obtuse at tip, 2.2 3.1 μm diam; clamp connections absent; odor strong, resembling burned plastic.
It can be divided into three parts, a phase delaying zone (CT12 to CT18 in Fig. 5D), a phase advancing zone (CT18 to CT2), and a dead zone (CT2 to CT12), where the stimulus has no or little effect on the activity phase.
We did not measure tau and circadian phase shifts in the same subjects, and it remains possible that humans with longer taus could also have a larger amplitude advance zone of their light PRC and advance more to the bright light stimulus than humans with shorter taus, who in turn could have a smaller amplitude phase advance zone of their light PRC.
Daan & Pittendrigh [31] showed that animals with a short tau have a relatively enhanced delay zone of their light PRC, while those with a long tau have a relatively enhanced advance zone of their light PRC.
Both wet and wet-dry tropical forests are now at the frontier of anthropogenic development, an ever-advancing zone that has long been equated with elevated biomass burning due to land clearing by humans [61].
Thus, within the frontal advance zone, ENCCs do not retain their spatial order.
It is likely that the length of the ENCC frontal advance zone varies with age and species.
Similar to light, neuronal firing induced an exaggerated phase change in a per S background compared to wild type in the advance zone (maximum 6 7 hr; Figure 4C).
Previous studies in which small regions of mesenchyme in explants of chick gut were replaced with quail gut mesenchyme suggested that the ENCC frontal advance zone is only around 200 to 300 μm long [ 27].
