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 Malkin   Manager  |
I've been looking at the 'longer pregnancies'-related genes in the Treehugger and Bondi Norns and have come across something of a snag. In Gene Compare, this gene looks like this in the Treehugger, Bondi and Civet: 203 Different in file Treehugger 13 0 You F MutDupCut 128 0 Organ# = 11, Creature, Reproductive, I am pregnant, chem=Progesterone, thresh=128, samp=3, gain=4, features=Digital (0) 203 Different in file Bondi 13 0 You F MutDupCut 128 0 Organ# = 11, Creature, Reproductive, I am pregnant, chem=Progesterone, thresh=153, samp=1, gain=3, features=Digital (0) 203 Different in file Civet 13 0 You F MutDupCut 128 0 Organ# = 11, Creature, Reproductive, I am pregnant, chem=Progesterone, thresh=128, samp=1, gain=3, features=Digital (0) With this in mind, what effects does the threshold, sample rate, and gain have on an emitter? How do they work together? As far as I can tell, the Treehugger recieves progesterone less frequently (sample rate of 3), but receives slightly more of it (gain of 4) to tide her over and prevent her from miscarrying. Note that the half-life of progesterone is higher in the Treehugger and Bondi (57 and 51 respectively, as opposed to 50), but this seems to mainly control the female recovery period. I haven't really worked out what the threshold does in this case. In Reproduction: The Genes, this is described as "An emitter begins to pump progesterone into her system to keep her pregnant and this also has a knock-on effect on several other chemicals." and further as "Emitter : Progesterone Digital emitter, expressed only in females This emitter is also tied to the ?I am pregnant? locus. Once the female is pregnant and the locus is set to 1, this emitter will pump out progesterone at a rate of 0.012 units of progesterone every tick until the locus is deactivated by the female laying an egg." My TCR Norns |
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 Jessica |
The Creatures Developer Resource has a pretty good description of what threshold, sample rate, and gain do in a chemical emitter. (Granted, the focus is on Creatures 1, but the information should still be applicable to C3/DS.) Basically, when the locus for "I am pregnant" sends out a signal, it is processed at the sample rate (the lower the value the faster) with the gain value. The threshold indicates the minimum value that the locus must be firing for the chemical to be injected. It really doesn't matter too much in this case, since a non-pregnant Norn should emit a value of 0, while a pregnant Norn should emit a value of 255 (in regards to this particular gene). In the examples, the Treehugger receives progesterone injections less frequently, but in a slightly higher quantity, as you said. Increasing the sample rate to higher values could create longer pregnancies, although there are probably numerous genes involved. My brain is tired at the moment, but I hope this is a helpful start for you! Good luck! |
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Malkin Manager |
It looks like the Toxic Norn was also intended to have a longer pregnancy, with a progesterone half-life of 55 and the following changes to the progesterone emitter: 203 Different in Toxic 13 0 You F MutDupCut 128 0 Organ# = 11, Creature, Reproductive, I am pregnant, chem=Progesterone, thresh=128, samp=2, gain=4, features=Digital (0) Not sure that it's noticeable, but it's still there in the genome.  My TCR Norns |
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