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Protein S (also known as PROS) is a vitamin K-dependent plasma glycoprotein synthesized in the liver. In the circulation, Protein S exists in two forms: a free form and a complex form bound to complement protein C4b-binding protein (C4BP). In humans, protein S is encoded by the PROS1 gene. [5] [6] Protein S plays a role in coagulation.
Protein S deficiency is a disorder associated with increased risk of venous thrombosis. [1] Protein S, a vitamin K-dependent physiological anticoagulant, acts as a nonenzymatic cofactor to activate protein C in the degradation of factor Va and factor VIIIa.
A representation of the 3D structure of the protein myoglobin showing turquoise α-helices. This protein was the first to have its structure solved by X-ray crystallography. Toward the right-center among the coils, a prosthetic group called a heme group (shown in gray) with a bound oxygen molecule (red).
Greek yogurt is a protein powerhouse, boasting around 20 grams of protein per cup. Top it with fresh or frozen fruit, a handful of nuts or granola and even a drizzle of honey for a balanced dish.
It’s not just beans and grains that double up on protein and fiber. With 2.6 g protein and 2.4 g fiber per cup of chopped broccoli , the ubiquitous green veggie is a great source of the two ...
“It’s not one size fits all when it comes to protein intake,” says Leslie Bonci, R.D.N., M.P.H., and sports dietitian for the Kansas City Chiefs. Above all else, consistency is key.
An S-layer (surface layer) is a part of the cell envelope found in almost all archaea, as well as in many types of bacteria. [1] [2] The S-layers of both archaea and bacteria consists of a monomolecular layer composed of only one (or, in a few cases, two) identical proteins or glycoproteins. [3]
Spike (S) glycoprotein (sometimes also called spike protein, [2] formerly known as E2 [3]) is the largest of the four major structural proteins found in coronaviruses. [4] The spike protein assembles into trimers that form large structures, called spikes or peplomers, [3] that project from the surface of the virion.