enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Chlorophyll a - Wikipedia

    en.wikipedia.org/wiki/Chlorophyll_a

    Chlorophyll a contains a magnesium ion encased in a large ring structure known as a chlorin. The chlorin ring is a heterocyclic compound derived from pyrrole. Four nitrogen atoms from the chlorin surround and bind the magnesium atom. The magnesium center uniquely defines the structure as a chlorophyll molecule. [8]

  3. Chlorophyll - Wikipedia

    en.wikipedia.org/wiki/Chlorophyll

    Chlorophyll f was announced to be present in cyanobacteria and other oxygenic microorganisms that form stromatolites in 2010; [13] [14] a molecular formula of C 55 H 70 O 6 N 4 Mg and a structure of (2-formyl)-chlorophyll a were deduced based on NMR, optical and mass spectra. [15]

  4. Light-harvesting complexes of green plants - Wikipedia

    en.wikipedia.org/wiki/Light-harvesting_complexes...

    The light-harvesting complex (or antenna complex; LH or LHC) is an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants and cyanobacteria, which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem. The antenna pigments are predominantly chlorophyll b, xanthophylls, and ...

  5. Pheophytin - Wikipedia

    en.wikipedia.org/wiki/Pheophytin

    Pheophytin a, i.e. chlorophyll a without the Mg 2+ ion.. Pheophytin or phaeophytin is a chemical compound that serves as the first electron carrier intermediate in the electron transfer pathway of Photosystem II (PS II) in plants, and the type II photosynthetic reaction center (RC P870) found in purple bacteria.

  6. Chlorin - Wikipedia

    en.wikipedia.org/wiki/Chlorin

    Bacteriochlorins are found in some bacteriochlorophylls; the ring structure is produced by Chlorophyllide a reductase (COR) reducing a chlorin ring at the C7-8 double boud. [5] Isobacteriochlorins are found in nature mostly as sirohydrochlorin , a biosynthetic intermediate of vitamin B 12 , produced without going through a chlorin.

  7. Photosynthetic reaction centre - Wikipedia

    en.wikipedia.org/wiki/Photosynthetic_reaction_centre

    The reaction begins with the excitation of a pair of chlorophyll molecules similar to those in the bacterial reaction center. Due to the presence of chlorophyll a, as opposed to bacteriochlorophyll, Photosystem II absorbs light at a shorter wavelength. The pair of chlorophyll molecules at the reaction center are often referred to as P680. [1]

  8. Does Chlorophyll Water Really Have Enough Health ... - AOL

    www.aol.com/news/does-chlorophyll-water-really...

    For premium support please call: 800-290-4726 more ways to reach us

  9. Chromophore - Wikipedia

    en.wikipedia.org/wiki/Chromophore

    This is a property of pH indicators, whose molecular structure changes upon certain changes in the surrounding pH. This change in structure affects a chromophore in the pH indicator molecule. For example, phenolphthalein is a pH indicator whose structure changes as pH changes as shown in the following table: