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  2. Pyrrole - Wikipedia

    en.wikipedia.org/wiki/Pyrrole

    Pyrrole is an extremely weak base for an amine, with a conjugate acid pK a of −3.8. The most thermodynamically stable pyrrolium cation (C 4 H 6 N +) is formed by protonation at the 2 position. Substitution of pyrrole with alkyl substituents provides a more basic molecule—for example, tetramethylpyrrole has a conjugate acid pK a of +3.7.

  3. Pyrrolidine - Wikipedia

    en.wikipedia.org/wiki/Pyrrolidine

    The pyrrolidine ring structure is present in numerous natural alkaloids i.a. nicotine and hygrine. It is found in many drugs such as procyclidine and bepridil. It also forms the basis for the racetam compounds (e.g. piracetam, aniracetam). The amino acids proline and hydroxyproline are, in a structural sense, derivatives of pyrrolidine.

  4. Heterocyclic amine - Wikipedia

    en.wikipedia.org/wiki/Heterocyclic_amine

    Nicotine is a molecule containing a pyrrolidine ring attached to a ring of pyridine (other heterocyclic amine). Nicotine belongs to a group of compounds known as alkaloids, which are naturally occurring organic compounds with nitrogen in them. Pyrrole is another compound made up of molecules with a five-membered heterocyclic ring. These ...

  5. Pyrrolysine - Wikipedia

    en.wikipedia.org/wiki/Pyrrolysine

    More recent data favor direct charging of pyrrolysine on to the tRNA(CUA) by the protein product of the pylS gene, leading to the suggestion that the LysRS1:LysRS2 complex may participate in a parallel pathway designed to ensure that proteins containing the UAG codon can be fully translated using lysine as a substitute amino acid in the event ...

  6. Pyrroline - Wikipedia

    en.wikipedia.org/wiki/Pyrroline

    Pyrrolines, also known under the name dihydropyrroles, are three different heterocyclic organic chemical compounds that differ in the position of the double bond.Pyrrolines are formally derived from the aromate pyrrole by hydrogenation. 1-Pyrroline is a cyclic imine, whereas 2-pyrroline and 3-pyrroline are cyclic amines.

  7. 22 high-protein, low-carb foods - AOL

    www.aol.com/news/15-high-protein-low-carb...

    (In fact, pumpkin seed protein contains more magnesium than other popular plant-based protein powders, like whey and soy.) They are also are a good source of healthy fats and add a nice crunch to ...

  8. The #1 Worst Protein for Belly Fat, Dietitians Reveal - AOL

    www.aol.com/1-worst-protein-belly-fat-150041817.html

    ShutterstockWhen you're focused on losing belly fat, there are many foods you may want to avoid consuming regularly. Although protein is an excellent addition to any healthy diet, as it helps keep ...

  9. Proline - Wikipedia

    en.wikipedia.org/wiki/Proline

    From a kinetic standpoint, cis–trans proline isomerization is a very slow process that can impede the progress of protein folding by trapping one or more proline residues crucial for folding in the non-native isomer, especially when the native protein requires the cis isomer.