• Farid
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    582 months ago

    Halp. Biochemistry is not my strong suit.

    • @[email protected]
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      832 months ago

      The large purple rectangle is a protein channel across a cell membrane. It’s normally closed, but can be opened by binding to a specific small molecule, which is called a ligand. Different channels have different ligands, and their presence/absence controls whether the channels will open.

      In the cartoon Larry the ligand has been traveling with his friends, who represent the cargo to be transferred through that channel. When they reach the closed channel, Larry uses himself as the “key” to open the channel. Since channels usually only stay open while the ligand is still bound, Larry stays behind to keep the channel open while his friends make their way forward.

      • @stoicmaverick
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        182 months ago

        I had the reverse problem, where I’m basically aware of all of the above, but I stared at it for like five straight minutes trying to figure out if there was a deeper joke relating to what the molecules were actually supposed to be, but I think I read too far into it.

        • @model_tar_gz
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          42 months ago

          Did you watch or read The Fellowship of the Ring?

          • Aatube
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            12 months ago

            So you’re saying Larry’s supposed to be in the shire?

      • Farid
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        112 months ago

        Thank you very much!
        I assume that only Larry type molecules were supposed to enter the cell?

          • Farid
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            52 months ago

            Again, thank you for the answer. And thank you for mimicking my rather useless emphasis.

        • Cethin
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          52 months ago

          This isn’t my strong suit either, but I think no. They open the channel so that other things can go through. They themselves are only the key to let the rest through. The cell needs a lot of stuff to function but this keeps the junk out.

    • @[email protected]
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      132 months ago

      The joke would have worked a lot better if Larry’s friends were different shapes. There’s no visual reason why Larry is the only one that can act as the key.