Carlos Martínez Amezcua likes the comment:
This is an interesting review. However, there are two or three important dietary interactions that have been overlooked. First, it is mentioned that methionine is necessary for the synthesis of choline, but I couldn't find anything on the re-methylation of homocysteine by betaine to form methionine. The re-methlyation of homocysteine is accomplished by betaine in the feed or that is formed in the ...
Carlos Martínez Amezcua likes the comment:
Hi Pirzado M.ZakriaThere is a matrix for multienzymes use. The general rule is: minerals from Phytase, energy from NSP and protein from protease (as 100%). From other enzymes, we take 50-25%. This is a simplification, of course, and the composition must be considered individually. For exact calculation please ask the producer/distributor as DSM, Danisco, AB or Addiseo.
Participation in Forum on November 3, 2023
@Dr. Fiodor S. Marchenkov, totally agree, but there is also a big problem that impacts response of enzymes, most individual matrices are also evaluated under conditions that do not apply in practice, look values from phytase commercial phytases, blame 5 - 10 improvement on amino acids digestibilities at 500 ftu, but several New publications confirm papers published with Dr. Parsons lab, matrices d ...
Article published the December 1, 2021
INTRODUCTIONSoybean meal´s good amino acids (AA) balance makes it an excellent protein source in poultry diets, although it does have the disadvantage of containing antinutritional factors such as trypsin inhibitors and lectins. These can negatively affect animal growth if the SBM is not adequately processed(1) using a proper cooking time and temperature to deactivate these factors(2). Exces ...
Participation in Forum on May 23, 2021
Carlos Martínez Amezcua, sorry for the mistakes, my Spanish translator betrayed me.
Participation in Forum on May 23, 2021
I totally agree, each nutrient has several functions, that is why I do not like the concept of replacing some of them with others that could be related, or be converted, some times this conversion is not 100% efficient, specially under stress conditions, if under those stress conditions, one function is increased, the extra dosage of the replace nutrient Will not help at all, example, conditional ...
Participation in Forum on May 20, 2021
Alfredo Irazusta,
I agree Betaine could have an impact, but we need to take care on Met + Cystein requierements, Cysteine is the first limiting amino acid in gut, and Cysteine is essential for Glutation and Glutation peroxidase, being the limiting amino acid under normal and stressal conditions, so I just recommend to be cautious whenever we defend replacement strategies
Participation in Forum on May 20, 2021
Park W. Waldroup, Dear Dr. Waldroup, great to read your comments, totally agree with you!!, specially under stress conditions, whenever cysteine requirements could increase, either to form glutation or any need for other protein or enzyme where cysteine is important, I will not play with Met + Cys requirements giving values to betain or even, be cautious with enzyme matrices!!, have a great day
Carlos Martínez Amezcua likes the comment:
We have extensively researched the relationship between betaine methionine and choline and at normal usage levels cannot recommended any sparing effect of betaine. However, it does aid in maintaining intestinal integrity and some studies have shown increased breast meat yield.
Carlos Martínez Amezcua likes the comment:
Carlos Martínez AmezcuaHi Carlos, Great point you are making! If we reduce the crude protein and use more crystalline amino acids to satisfy their requirement soybean meal inclusion is decreased. There will likely be less benefit of phytase as there is less substrate (phytin) for the phytase to degrade. I don't have the full answer but I agree that the phytase matrix values will likely be a ...