glycine molecular weight high so mobility also high so using in SDS PAGE
Glycine increases the mobility of the gel.
Laemmli U. K.
The stacking gel is a large pore PAG (4%T). This gel is prepared with Tris/HCl buffer pH 6.8 of about 2 pH units lower than that of electrophoresis buffer (Tris/Glycine). These conditions provide an environment for Kohlrausch reactions determining molar conductivity, as a result, SDS-coated proteins are concentrated to several fold and a thin starting zone of the order of 19 μm is achieved in a few minutes. This gel is cast over the resolving gel. The height of the stacking gel region is always maintained more than double the height and the volume of the sample to be applied.this is based on [isotachophoresis] that is glycine from electrophoresis buffer have lower electrophoretic mobility than protein-sds complex which is less mobile than cl- ions.giycine-
Let's put it this way, we know that electrophoresis is a test for the sizes of the fragments of DNA molecules while SDS-page is a test of the size of protein molecules. If you use electrophoresis to test the differences of protein, there will not be any bands as all the protein will travel to the end of SDS-page. Therefore, we can conclude that the pores of electrophoresis is much more larger than SDS-page. Since electrophoresis has larger pores than SDS-page, it also shows that overall DNA is larger than protein in size.
there is nothing like SDS phage but... 1. SDS is a well know detergent used to denature proteins before electrophoresis called SDSPAGE. 2. phage (bacteriophage) is a virus that infects the bacteria which contains eother DNA or RNA. SDS PAGE can be used to determine the phage proteins which u can call SDSPAGE of phage.
Glycine increases the mobility of the gel.
Has higher viscosity than water and makes sample fall to the bottom
transport
may be because of toomany disulfide linkages
Due to many proline residues it migrates slower on sds page and appears heavier than it is.
The major drawback is that treatment with SDS denatures the protein, meaning you are not looking at it in its natural state.
It is the gel of choice for SDS PAGE
Laemmli U. K.
TEMED is used during the gel preparation for SDS PAGE. It initiates polymerization of ammonium per sulphate. Hence if you add more TEMED the gel becomes hard and if you add less than required the gel does not solidifies!
The stacking gel is a large pore PAG (4%T). This gel is prepared with Tris/HCl buffer pH 6.8 of about 2 pH units lower than that of electrophoresis buffer (Tris/Glycine). These conditions provide an environment for Kohlrausch reactions determining molar conductivity, as a result, SDS-coated proteins are concentrated to several fold and a thin starting zone of the order of 19 μm is achieved in a few minutes. This gel is cast over the resolving gel. The height of the stacking gel region is always maintained more than double the height and the volume of the sample to be applied.this is based on [isotachophoresis] that is glycine from electrophoresis buffer have lower electrophoretic mobility than protein-sds complex which is less mobile than cl- ions.giycine-
breaks the disulfide bonds, reduces the crosslinking in proteins, and hence, denatures it.
SDS-PAGE method