Lucina pectinata’s ctenidia contains three hemeproteins: the hydrogen sulfide reactive hemoglobin I (HbI) and the oxygen transporting hemoglobins II and III (HbII and HbIII) that remain unaffected by the presence of H2S. ...

Hemoglobin I (HbI) from Lucina pectinata (clam) is a protein that binds and transports H2S to the bacteria in the clam. HbI is one of the few known hemoglobins that carries H2S, toxic gas, in its active site, which contains ...

Sulfhemoglobin is a non-functional derivative of hemoglobin known to be produced by exposure to sulfa drugs, air pollution and others. It is formed by the reaction between H2O2, H2S and the heme group in the presence of ...

The clam Lucina pectinata Hemoglobin I (HbI) is a monomeric protein with a prosthetic group, known as heme group, in which the iron atom can either be in the ferrous (Fe(II)) or the ferric (Fe(III)) oxidation state. This ...

Today, efforts are focused in the production of a second-generation blood substitutes that minimizes the oxidative stress and the tissue vasoactivity. The infused cell-free hemoglobin’s can act as nitric oxide (NO) scavenger ...

Lucina pectinata (Gmelin, 1791) is a clam that can be found in sulfide-rich muds in the coastal mangroves of the southwest coast of Puerto Rico. It contains three different hemoglobins in the gill tissue, hemoglobin I, ...

The hemoglobin I (HbI) from the clam Lucina pectinata is an intriguing hemeprotein that binds and transports H2S to chemoautotrophic bacteria to maintain a symbiotic relationship and to protect the mollusk from H2S toxicity. ...

Since the 1863 discovery of a new green hemoglobin derivative called “sulfhemoglobin”, the nature of its characteristic 618 nm absorption band and formation mechanism has been the subject of several hypotheses. Many ...

A large number of heme enzymes catalyze the heterolysis of hydrogen peroxide (H2O2) and H2O2 is used as a source of oxidizing equivalents for biological oxidative reaction. Despite the increased understanding of the reactions ...

Hemoglobins comprise a challenging area of study within biochemical research. They play an important physiological role in organisms, like oxygen transport and storage. Three hemoglobins were discovered in the ctenidia ...