- published: 12 Nov 2014
- views: 5531
A heme (American English) or haem (British English) is a prosthetic group that consists of an iron atom contained in the center of a large heterocyclic organic ring called a porphyrin. Not all porphyrins contain iron, but a substantial fraction of porphyrin-containing metalloproteins have heme as their prosthetic group; these are known as hemoproteins. Hemes are most commonly recognized in their presence as components of hemoglobin, the red pigment in blood, but they are also components of a number of other hemoproteins.
Hemoproteins have diverse biological functions including the transportation of diatomic gases, chemical catalysis, diatomic gas detection, and electron transfer. The heme iron serves as a source or sink of electrons during electron transfer or redox chemistry. In peroxidase reactions, the porphyrin molecule also serves as an electron source. In the transportation or detection of diatomic gases, the gas binds to the heme iron. During the detection of diatomic gases, the binding of the gas ligand to the heme iron induces conformational changes in the surrounding protein.
The girl who cried love, won't you come and play with me
You can be Cassandra, underneath the sword of Democles
We'll tear this baby apart wise like Solomon
run, come shatter me now
Shatter me with hope
Crawl, come breathe me in, bleed out all sorrow
Scream me a dream, untouched by shadows
Baby, shatter me now, shatter me now
Shatter me with hope
She'll be the witness to the repose of Nevelen
Push the needle in
To the of canticles of ecstasy
Turn to page 43
And you'll know how I feel
Run, come shatter me now, shatter me with hope
Crawl come breathe me in, bleed out all sorrow
Scream me a dream, untouched by shadows
Baby, shatter me now, shatter me now
shatter me with hope
Swear on your hearts grave im wrong
and love like your life's depending on it
cause it is!
We'll tear this baby apart, wise like Solomon
Turn to page forty three, and you'll know how I feel
Run, come shatter me now, shatter me with hope
Crawl, come breathe me in
Bleed out all sorrow
Scream me a dream, untouched by shadows
Baby, shatter me now, shatter me now
shatter me with hope
Shatter me now, shatter me now, shatter me now
hope
Shatter me now shatter me now shatter me now
hope, hope
Scream me a dream
(Shatter me now shatter me now shatter me now)
Scream me a dream