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Thread: waste and evolution of complex systems

  1. #1 waste and evolution of complex systems 
    Forum Masters Degree Golkarian's Avatar
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    Nov 2008
    I was looking at the coomplement system, part of the innate immune system, and alot of proteins like C3 cleave to form two proteins with different uses, do you think that in the evolution of complex systems waste products (perhaps C3b was once one) could have been co-opted into developing systems? Or do most molecules like C3 have no use on their own so it would be better just to make C3a right off the bat?

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  3. #2  
    Forum Cosmic Wizard i_feel_tiredsleepy's Avatar
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    Mar 2008
    Cascades allow for amplification of a signal. Also, it might not be a good idea to have a bunch of proteins in the blood that punch holes in membranes to always be activated. So, having a inactive pre-cursor allows for regulation.

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  4. #3  
    Forum Ph.D.
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    Aug 2006
    You're forgetting that the larger proteins have a different function or no function (other than to be switched off in a regulated way). In cleavage of a protein, there are parts which will of course have no immediate function.
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