See Also: phytoporphyrin(medicine)
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paramyosin (medicine) and phytoporphyrin (medicine)


paramyosin (medicine)


paramyosin
<protein> Protein (200-220 kD) that forms a core in the thick filaments of invertebrate muscles.

The molecule is rather like the rod part of myosin and has a two chain coiled coil _ helical structure, 130 nm by 2 nm. Paramyosin is present in particularly high concentration in the catch muscle of bivalve molluscs, where it forms the almost crystalline core of the thick filaments.


phytoporphyrin (medicine)


phytoporphyrin


A porphyrin similar to the pheophorbide of the chlorophylls but with the vinyl group replaced by an ethyl group, with no methoxycarbonyl group, and minus two hydrogen atoms, producing one more double bond in ring D.