It is widely known that peptides are sold on basis of purity. All the peptides for sale have a certified purity and the use of the peptide actually determines the purity that you would need. In this article, we have listed some of the different purities in which peptides are available and we have listed the uses of the purity of the peptides along with the purity of the peptide. Let us now have a look at the different purity standards available in the market.
99% or higher – This is one of the purest forms of peptides available in the market. They are mostly used for crystallography and qualitative assays such as dose response. These are mostly used in labs for research purpose
95% or higher – Peptides with purity of 95% are mainly used for SAR studies. They are also used for enzymology and competition assays. These are mainly used as the cost of the peptides with this purity is relatively lower than the ones with 99% of purity.
90% or higher – There are three major uses of peptides with 90% of purity. Their common uses are in Bioassays, Epitope Mapping and NMR. So if you are looking for a peptide to be used in any of these three domains then you should buy the one with at least 90% of purity.
80% or higher – Peptides with 80% of purity is used for immunological assays and antibody affinity purification. Sometimes, these peptides may also be used for polyclonal antibody production.
Desalted – Desalted Peptides may not guarantee you of any minimum purity and these peptides are mainly used to check the purity rate of peptides itself. The reason why no minimum purity can be guaranteed is that the purity is highly dependent on the sequence of amino acids. Another common use of desalted peptide is in quantitative MS.
These are some of the common peptides purity available in the market and you might want to consider the advice of an expert before actually purchasing the peptides.