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  2. Peptide - Wikipedia

    en.wikipedia.org/wiki/Peptide

    A dipeptide has two amino acids. A tripeptide has three amino acids. A tetrapeptide has four amino acids. A pentapeptide has five amino acids. (e.g., enkephalin). A hexapeptide has six amino acids. (e.g., angiotensin IV). A heptapeptide has seven amino acids. (e.g., spinorphin). An octapeptide has eight amino acids (e.g., angiotensin II).

  3. Dipeptide - Wikipedia

    en.wikipedia.org/wiki/Dipeptide

    A dipeptide is an organic compound derived from two amino acids. The constituent amino acids can be the same or different. When different, two isomers of the dipeptide are possible, depending on the sequence. Several dipeptides are physiologically important, and some are both physiologically and commercially significant.

  4. Protein secondary structure - Wikipedia

    en.wikipedia.org/wiki/Protein_secondary_structure

    Secondary structure is formally defined by the pattern of hydrogen bonds between the amino hydrogen and carboxyl oxygen atoms in the peptide backbone. Secondary structure may alternatively be defined based on the regular pattern of backbone dihedral angles in a particular region of the Ramachandran plot regardless of whether it has the correct ...

  5. Peptide bond - Wikipedia

    en.wikipedia.org/wiki/Peptide_bond

    Peptide bond formation via dehydration reaction. When two amino acids form a dipeptide through a peptide bond, [1] it is a type of condensation reaction. [2] In this kind of condensation, two amino acids approach each other, with the non-side chain (C1) carboxylic acid moiety of one coming near the non-side chain (N2) amino moiety of the other.

  6. Aminopeptidase - Wikipedia

    en.wikipedia.org/wiki/Aminopeptidase

    Aminopeptidases are a diverse group of enzymes that play crucial roles in various biological processes, including protein digestion, cell growth, and immune response.They are classified based on their substrate specificity (strength of binding) and catalytic mechanism (means of catalyzing their reaction) into two main categories: metalloaminopeptidases and cysteine aminopeptidases.

  7. Antimicrobial peptides - Wikipedia

    en.wikipedia.org/wiki/Antimicrobial_peptides

    The initial contact between the peptide and the target organism is electrostatic, as most bacterial surfaces are anionic, or hydrophobic, such as in the antimicrobial peptide Piscidin. Their amino acid composition, amphipathicity, cationic charge and size allow them to attach to and insert into membrane bilayers to form pores by ‘barrel-stave ...

  8. Today's Wordle Hint, Answer for #1318 on Monday ... - AOL

    www.aol.com/todays-wordle-hint-answer-1318...

    Missing plane with 10 aboard found crashed in Alaska, no survivors expected. Sports. Sports. Associated Press. The Suns' Big 3 is still together after the trade deadline, so the search for success

  9. Peptidoglycan - Wikipedia

    en.wikipedia.org/wiki/Peptidoglycan

    In step 7, the UDP–MurNAc is converted to UDP-MurNAc pentapeptide by the addition of five amino acids, usually including the dipeptide D-alanyl-D-alanine. [20] This is a string of three reactions: EC 6.3.2.8 by MurC, EC 6.3.2.9 by MurD, and EC 6.3.2.13 by MurE. [21] Each of these reactions requires the energy source ATP. [20]