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Les acides aminés

Les acides aminés. Structure , classification , propriétés chimiques et utilisation. Ján Mackovčák , IV.F. Acides aminés. Composés chimiques 2 groupements fonctionnels Amphotères. Structure. Liaison peptidique

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Les acides aminés

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  1. Les acidesaminés Structure, classification, propriétéschimiquesetutilisation. Ján Mackovčák, IV.F

  2. Acidesaminés • Composéschimiques • 2 groupementsfonctionnels • Amphotères

  3. Structure • Liaisonpeptidique H2N–CHRa–COOH   +   H2N–CHRb–COOH   →   H2O   +   H2N–CHRa–CO–NH–CHRb–COOH

  4. Acidesaminésessentiels Phénylalanine (F, Phe) Arginine (R, Arg) Leucine (L, Leu) Histidine (H, His)

  5. Méthionine (M, Met) Tryptophane(W, Trp) Lysine (K, Lys) Valine (V, Val) Isoleucine (I, Ile) Thréonine (T, Thr)

  6. Acidesaminésnon-essentiels Glycine (G, Gly) Alanine (A, Ala) Cystéine (C, Cys) Glutamine (Q, Gln)

  7. Propriétés • Point isoélectrique, électrophorèse -˃ (en présence d'H+) CH3 – CH – COOH NH3+ -˃ (en présence d'OH-) CH3 – CH – COO- NH2

  8. Sources • http://www.snv.jussieu.fr/vie/dossiers/acideamine/acideamine.htm • http://www.ac-nancy-metz.fr/enseign/physique/chim/jumber/aminoacides/les_aminoacides_fichiers/aminoacides.htm • http://www.youtube.com/watch?v=Vp4a8oZkQmA • http://voices.yahoo.com/amino-acids-facts-wanted-know-2041225.html?cat=5 • http://fr.wikipedia.org/wiki/Acide_amin%C3%A9

  9. Mercipourvotreattention.

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