Category: Glycine system
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Staphylokinase (SAK) aka staphylococcal fibrinolysin or Müller’s factor
Staphylokinase (SAK; also known as staphylococcal fibrinolysin or Müller’s factor) is a protein produced by Staphylococcus aureus. It contains 136 amino acid residues and has a molecular mass of 15kDa. Synthesis of staphylokinase occurs in late exponential phase. It is similar to streptokinase. Fibrinolysin is an enzyme derived from plasma of bovine origin (plasmin) or extracted from cultures of certain bacteria. (more below) Staphylokinase is positively…
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Proline and a few other notes
Proline (symbol Pro or P) is an organic acid classed as a proteinogenic amino acid (used in the biosynthesis of proteins), although it does not contain the amino group -NH2 but is rather a secondary amine. The secondary amine nitrogen is in the protonated form (NH2+) under biological conditions, while the carboxyl group is in the deprotonated −COO− form. The “side chain” from the α carbon connects to the nitrogen forming a pyrrolidine loop, classifying it…
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Serine
Serine (symbol Ser or S) is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated −NH+3 form under biological conditions), a carboxyl group (which is in the deprotonated −COO− form under biological conditions), and a side chain consisting of a hydroxymethyl group, classifying it as a polar amino acid. It can be synthesized in the human body under normal physiological circumstances, making…
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