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- https://bio.libretexts.org/Courses/Reedley_College/Biology_for_Science_Majors_I/03%3A_Biological_Macromolecules/3.05%3A_ProteinsProteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or pr...Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective; they may serve in transport, storage, or membranes; or they may be toxins or enzymes. Each cell in a living system may contain thousands of proteins, each with a unique function. Their structures, like their functions, vary greatly.
- https://bio.libretexts.org/Courses/University_of_California_Davis/BIS_2A%3A_Introductory_Biology_(Igo)/Winter_2018_Igo_Readings/W2018_Bis2A_Lecture05_readingpK a is defined as the negative log 10 of the dissociation constant of an acid, its K a . Therefore, the pK a is a quantitative measure of how easily or how readily the acid gives up its proton [H + ]...pK a is defined as the negative log 10 of the dissociation constant of an acid, its K a . Therefore, the pK a is a quantitative measure of how easily or how readily the acid gives up its proton [H + ] in solution and thus a measure of the "strength" of the acid.
- https://bio.libretexts.org/LibreTexts/University_of_California_Davis/BIS_2A%3A_Introductory_Biology_(Igo)/Winter_2018_Igo_Readings/W2018_Bis2A_Lecture05_readingpK a is defined as the negative log 10 of the dissociation constant of an acid, its K a . Therefore, the pK a is a quantitative measure of how easily or how readily the acid gives up its proton [H + ]...pK a is defined as the negative log 10 of the dissociation constant of an acid, its K a . Therefore, the pK a is a quantitative measure of how easily or how readily the acid gives up its proton [H + ] in solution and thus a measure of the "strength" of the acid.
- https://bio.libretexts.org/Courses/City_College_of_San_Francisco/Introduction_to_Microbiology/07%3A_Microbial_Biochemistry/7.03%3A_ProteinsAmino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous fun...Amino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous functions vital to all organisms. The molecules derived from amino acids can function as structural components of cells and subcellular entities, as sources of nutrients, as atom- and energy-storage reservoirs, and as functional species such as hormones, enzymes, receptors, and transport molecules.
- https://bio.libretexts.org/Courses/Portland_Community_College/Cascade_Microbiology/21%3A_Appendix_A_-_Biochemistry_Review/21.4%3A_ProteinsAmino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous fun...Amino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous functions vital to all organisms. The molecules derived from amino acids can function as structural components of cells and subcellular entities, as sources of nutrients, as atom- and energy-storage reservoirs, and as functional species such as hormones, enzymes, receptors, and transport molecules.
- https://bio.libretexts.org/Courses/City_College_of_San_Francisco/Introduction_to_Microbiology_OER_-_Ying_Liu/03%3A_Macromolecules/3.08%3A_Proteins_-_Building_BlocksAmino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous fun...Amino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous functions vital to all organisms. The molecules derived from amino acids can function as structural components of cells and subcellular entities, as sources of nutrients, as atom- and energy-storage reservoirs, and as functional species such as hormones, enzymes, receptors, and transport molecules.
- https://bio.libretexts.org/Courses/North_Central_State_College/BIOL_1550%3A_Microbiology_(2025)/03%3A_Macromolecules/3.09%3A_Protein_StructuresAmino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous fun...Amino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous functions vital to all organisms. The molecules derived from amino acids can function as structural components of cells and subcellular entities, as sources of nutrients, as atom- and energy-storage reservoirs, and as functional species such as hormones, enzymes, receptors, and transport molecules.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_1e_(OpenStax)/1%3A_The_Chemistry_of_Life/3%3A_Biological_Macromolecules/3.4%3A_ProteinsProteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or pr...Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective; they may serve in transport, storage, or membranes; or they may be toxins or enzymes. Each cell in a living system may contain thousands of proteins, each with a unique function. Their structures, like their functions, vary greatly.
- https://bio.libretexts.org/Courses/Norco_College/OpenStax_Biology_2e_for_Norco_College/03%3A_Biological_Macromolecules/3.05%3A_ProteinsProteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or pr...Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective; they may serve in transport, storage, or membranes; or they may be toxins or enzymes. Each cell in a living system may contain thousands of proteins, each with a unique function. Their structures, like their functions, vary greatly.
- https://bio.libretexts.org/Bookshelves/Microbiology/Microbiology_(OpenStax)/07%3A_Microbial_Biochemistry/7.04%3A_ProteinsAmino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous fun...Amino acids are capable of bonding together in essentially any number, yielding molecules of essentially any size that possess a wide array of physical and chemical properties and perform numerous functions vital to all organisms. The molecules derived from amino acids can function as structural components of cells and subcellular entities, as sources of nutrients, as atom- and energy-storage reservoirs, and as functional species such as hormones, enzymes, receptors, and transport molecules.
- https://bio.libretexts.org/Courses/Ouachita_Baptist_University/Reyna_Cell_Biology/01%3A_(T1)_Basic_Cell_Chemistry_-_Chemical_Compounds_and_their_Interactions/1.06%3A_Amino_AcidsMost of the major molecules of the cell - whether structural, like cellular equivalents of a building’s girders and beams, or mechanical, like enzymes that take apart or put together other molecules, ...Most of the major molecules of the cell - whether structural, like cellular equivalents of a building’s girders and beams, or mechanical, like enzymes that take apart or put together other molecules, are proteins. Proteins interact with a wide variety of other molecules, though any given interaction is usually quite specific. The specificity is determined in part by electrical attraction between the molecules.
