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Related Concept Videos

The Phosphorus Cycle01:21

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
Phosphorylation01:02

Phosphorylation

The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Factors Affecting Solubility04:01

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
Washing, Drying, and Ignition of Precipitates00:52

Washing, Drying, and Ignition of Precipitates

After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Phosphate Buffer01:22

Phosphate Buffer

The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...

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Related Experiment Video

Updated: Jun 13, 2026

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
08:21

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Published on: May 18, 2018

Ironing out the phosphorus problem.

Joshua J Zaritsky1, Isidro B Salusky

  • 1Department of Pediatrics, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA. jzaritsky@mednet.ucla.edu

Kidney International
|May 1, 2010
PubMed
Summary
This summary is machine-generated.

Serum phosphorus control is challenging in chronic kidney disease. A new iron-based phosphate binder, SBR759, shows promise as a well-tolerated and effective treatment option for dialysis patients.

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Last Updated: Jun 13, 2026

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
08:21

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method

Published on: May 18, 2018

High-Throughput Measurement and Classification of Organic P in Environmental Samples
08:58

High-Throughput Measurement and Classification of Organic P in Environmental Samples

Published on: June 8, 2011

Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants
12:06

Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants

Published on: October 19, 2017

Area of Science:

  • Nephrology
  • Clinical Pharmacology

Background:

  • Serum phosphorus control is a significant challenge for patients with chronic kidney disease (CKD).
  • Phosphate binders are essential for managing hyperphosphatemia in dialysis patients.
  • Existing binders may have limitations, necessitating the development of novel agents.

Discussion:

  • This study evaluated SBR759, a novel non-calcium, iron-based phosphate binder, in a phase I clinical trial.
  • The trial assessed the safety and efficacy of SBR759 in the context of CKD management.
  • Potential risks, such as iron accumulation and hypocalcemia, were considered.

Key Insights:

  • SBR759 demonstrated good tolerability and effectiveness in the initial safety and efficacy assessment.
  • The iron-based formulation offers an alternative to traditional calcium-based binders.
  • A powder formulation may enhance patient compliance and administration.

Outlook:

  • Further clinical trials are warranted to confirm the long-term safety and efficacy of SBR759.
  • SBR759 could represent a valuable addition to the therapeutic options for hyperphosphatemia in CKD.
  • Investigating strategies to mitigate potential iron accumulation will be crucial for widespread adoption.