Protein Information

Name hemoglobin (protein family or complex)
Synonyms Hemoglobin; Hemoglobins

Compound Information

Name cacodylic acid
CAS dimethylarsinic acid

Reference List

PubMed Abstract RScore(About this table)
1846749 Song SH, Asher SA: Internal intensity standards for heme protein UV resonance Raman studies: excitation profiles of cacodylic acid and sodium selenate. Biochemistry. 1991 Feb 5;30(5):1199-205.

In contrast, similar concentrations of cacodylic acid and SeO4 (2-) show little effect on the hemoglobin tertiary or quaternary protein structures or upon the R----T transition induced by IHP.
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18247522 Naranmandura H, Suzuki KT: Identification of the major arsenic-binding protein in rat plasma as the ternary dimethylarsinous-hemoglobin-haptoglobin complex. Chem Res Toxicol. 2008 Mar;21(3):678-85. Epub 2008 Feb 2.

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17226924 Lu M, Wang H, Li XF, Arnold LL, Cohen SM, Le XC: Binding of dimethylarsinous acid to cys-13alpha of rat hemoglobin is responsible for the retention of arsenic in rat blood. Chem Res Toxicol. 2007 Jan;20(1):27-37.

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15606151 Lu M, Wang H, Li XF, Lu X, Cullen WR, Arnold LL, Cohen SM, Le XC: Evidence of hemoglobin binding to arsenic as a basis for the accumulation of arsenic in rat blood. Chem Res Toxicol. 2004 Dec;17(12):1733-42.

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2330802 Akita M, Seno S, Awai M: Intestinal absorption of cationic and anionic ferric colloids and complexes: biochemical, histochemical and morphological observations in rats. Nippon Ketsueki Gakkai Zasshi. 1990 Feb;53(1):1-13.


Observation of rats given oral administration of 59Fe-labeled cationic cacodylate ferric (59Fe-Cac) colloid, anionic citrate ferric (59Fe-Cit) colloid, cationic 59Fe-Cac complex and anionic 59Fe-Cit complex revealed that iron absorption was more efficient in the 59Fe-Cac colloid, moderate in the 59Fe-Cac complex, low in the 59Fe-Cit colloid, and lowest in the 59Fe- cases given 59Fe-Cac colloid and 59Fe-Cac complex, a very high ratio activity was found in the liver and in the erythrocyte or hemoglobin in circulating blood, while the blood plasma, bone marrow, and spleen were low in activity.
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7586052 Delnomdedieu M, Styblo M, Thomas DJ: Time dependence of accumulation and binding of inorganic and organic arsenic species in rabbit erythrocytes. Chem Biol Interact. 1995 Oct 20;98(1):69-83.


On average, 20% of the total erythrocyte As (III) burden is associated with the protein fraction, particularly with hemoglobin (Hb).
1(0,0,0,1) Details
18613716 Lu M, Wang H, Wang Z, Li XF, Le XC: Identification of reactive cysteines in a protein using arsenic labeling and collision-induced dissociation tandem mass spectrometry. J Proteome Res. 2008 Aug;7(8):3080-90. Epub 2008 Jul 10.


Using this method, we have identified two highly reactive binding sites in rat hemoglobin (Hb): Cys-13alpha and Cys-125beta.
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