What does the standard methionine and methionine mean by cystine?

The reason why methionine, methionine + cystine are listed at the same time is because there is a concept in nutrition, that is, "semi-essential amino acids". It refers to amino acids that can replace or save some essential amino acids under certain conditions. In the body, cysteine or cystine, tyrosine and serine can be converted from methionine, phenylalanine and glycine respectively, and their needs can be met by methionine, phenylalanine and glycine, but the specific needs of animals for methionine and phenylalanine cannot be met by cysteine or cystine and tyrosine, so in nutrition, cysteine or cystine, tyrosine and serine are called semi-essential amino acids.

It has been shown that 50% of the total sulfur amino acid (met+cys) requirements of non-ruminants can be replaced by cystine (or cysteine). At least 50% of the aromatic amino acids (PHE+TYR) requirements can be met by tyrosine. Because the content of glycine in feed raw materials is relatively rich, there is little information about it, but some studies have shown that the effect of glycine on poultry is quite important, and the demand is also very large.

In summary, the purposes of the two are summarized at the same time: 1. To evaluate whether the cystine requirement (met+cys) is met when methionine meets the need? If it is not satisfied, the need for methionine needs to be increased; 2. How much to add?

As mentioned above, 50% of its requirements can be met by methionine, which is 2 times the amount of methionine that is insufficient in met+cys. If there is anything inappropriate in the above remarks, please correct it!

Methionine + cystine as a whole represents the requirement of sulfur-containing amino acids, which can be provided by all methionine, but cystine can also provide 50% of the amount of sulfur-containing amino acids, and the rest can only be provided by methionine, so the requirements of methionine are listed. The reason why cystine** is more abundant and cheaper is that methionine is more expensive.

Eggs and cysts can be converted into each other in the animal's body!

Poultry formulations are particularly important.

How to set methionine, and egg plus cyst? Are there any rules to follow?

The structure of cystine is: cystine (left and right structure) ammonia (semi-surrounding structure) acid (left and right structure).

The structure of cystine is: cystine (left and right structure) ammonia (semi-surrounding structure) acid (left and right structure). The phonetic pronunciation is: Pinyin is: guāngānsuān.

What is the specific explanation of cystine, we will introduce it to you through the following square bush wheel faces:

1. Explanation of terms [click here to view the details of the plan].

Cystine guāng'ānsuān. (1) a colorless crystalline amino acid-Sch2CH(NH2)COOH2, which is a component of most proteins (such as keratin in horn, hair, and hair), and can be obtained from the hydrolysis of these proteins, and cysteine is also obtained; , dithiodiaminopropionic acid. (2) See also "bladder".

2. Network Explanation.

Cystine helps in the formation of cystine and is important for detoxification, by reducing the body's ability to absorb copper, cystine protects cells from copper poisoning. When it is metabolized, sulfuric acid is released, and sulfuric acid reacts chemically with other substances to increase the detoxification function of the entire metabolic system. In addition, it assists in the supply of insulin, which is necessary for the body to utilize sugar and starch.

It can also promote cellular redox, make liver function vigorous, promote leukocyte proliferation, and prevent the development of pathogenic bacteria.

Idioms about cystine.

Sour and mean, dog evil wine, sweet and sour, sour, bitter and spicy, sour

Words about cystine.

Sour text, fake vinegar, cold and sour, bitter, bitter, sour, s

Sentence formation about cystine.

1. It is recognized that microcystine toxoids are potentially harmful to humans and aquatic animals, and this time it is just a spectator.

2. Proton pumps that are not in the stomach, such as in lysosomes, have no cysteine residues left in their acid accumulation chamber. In this case, proton pump inhibitors do not inhibit proton secretion.

4. Proteolysis is a molecular event activated by cysteine protease, which is an early molecular marker of cellular programmed death.

5. This chain must be bent and folded, so that these cysteines are close together.

No. Cysteine is a common amino acid in living organisms, which can be converted from methionine (methionine, an essential amino acid) in the body, and can be converted with cystine. Cysteine is a naturally occurring amino acid that has many uses in food processing, and it is mainly used in baked goods as an essential ingredient in dough improvers.

Cysteine is a reducing agent that promotes the formation of gluten, reducing the time required for mixing and the amount of energy required for medicinal use, cysteine weakens the structure of proteins by altering the disulfide bonds between and within protein molecules, so that proteins stretch in.

Cystine is an amino acid drug, which can promote cellular redox function, make liver function vigorous, neutralize toxins, promote leukocyte proliferation, and prevent the development of pathogenic bacteria; Vitamin B1 binds to adenosine triphosphate to form vitamin B1 pyrophosphate (thiamine diphosphate, cocarboxylase), which is an essential coenzyme for carbohydrate metabolism; Vitamin B1 can inhibit the activity of cholinesterase, and when it is deficient, the activity of cholinesterase is enhanced, and the hydrolysis of acetylcholine is accelerated, causing nerve impulse conduction disorders and affecting gastrointestinal and myocardial function; Calcium pantothenate is a precursor of coenzyme A, which is an essential substance for a variety of metabolic links (including carbohydrates, proteins and lipids), can participate in the synthesis of steroids, porphyrins, acetylcholine and other substances, and can maintain normal epithelial function.

It does not have the same efficacy. Cysteine is a reducing agent. Cystine is an amino acid drug.