genomebiology.com...
Hundreds of genes resemble bacterial proteins not found in other eukaryotes, suggesting extensive horizontal transfer from prokaryotes. These may play
roles in xenobiotic metabolism and stress responses.
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This really has to do with the cellular respiration mechanisms of certain alien races involved in our DNA construction. There were 12 main races, and
much animal DNA was used to 'fill in the gaps', and in some cases, merely to play around with genetics in experiments. Most humans on Earth now
have residuals of these experiments. Scorpion, Jellyfish, Stingray, Aphid, you name it, someone has got their DNA in a marginal section of their
sequence.
And yes, there is also bacterial DNA in our genome, which was inserted to 'mesh' the DNA sequences of certain non-human alien races with the human
DNA. This way we would live and function rather than dying at birth as we would without such DNA.
Our whole genome was ultimatley engineered by the genius Sirian As, who are the most technologically advanced race in the galaxy. Through their
genius, a Reptilian and a human could be combined to form a working organism.
Unfortunately, there are still problems with our structure. For instance, the Reptilian brain is actually in constant conflict with the mammalian
necortex. In a normal (for instance Pleiadeian) human, the lower brain is of a mammalian type. In Earth-humans, it is Reptilian. In a normal (for
instance Draco) Reptilian, the neocortex is of a Reptilian type. Therefore in the original species from which our DNA originates, the brain functions
as a whole.
However, in Earth humans there is a sort of dissonance between the neurological patterns of the Reptilian brain and those of the Mammalian neocortex.
This can be demonstrated by examining both psychology and EEG scans.
An example of this is moral systems. A guy steals your wallet and runs off with it. The Reptilian brain, being fight or flight in nature, tells you
to chase after the guy and kill him. The Mammalian brain tells you to call the police and settle the matter as peacefully as possible.
Your decision depends upon which brain you obey.
It is good to keep a balance between both brains. After all, we are a combination of both species.