Cell Culture Products
Human Male AB Plasma-Derived Serum:
Our Human Male AB Plasma-Derived Serum is collected from donors meeting the health requirements established by 21CFR 640, subpart G via plasmapheresis. The plasma is collected at FDA licensed facilities in the US. These individual units are converted to serum from plasma using our proprietary process under cGMP in at ISO certified manufacturing facility.
Human Male AB Serum: Off the Clot
Is a non-AB human serum meant for use on human cells where FBS is being used. It is 100% mixed gender, mixed blood type human serum manufactured using our proprietary process under cGMP in an ISO certified facility.
All Human Serum products can be heat inactivated and gamma irradiated.
- Our heat inactivation protocol brings the temperature of the material to 56° C and maintains this temperature for 30 minutes. Some precipitate may be evident, which can be removed by filtration, if desired.
- Our Gamma Irradiation process is fully validated with a completed virus validation study. More information can be obtained by contacting us at firstname.lastname@example.org or by completing our Contact US Page.
PRECIPITATES IN SERUM PRODUCTS
Do precipitates cause damage to my cells?
Precipitates can naturally be found in serum from any manufacturer. Although it can affect the appearance and photo-micrographic documentation, precipitates have not been shown to affect performance or to have any impact on cultured cells.
What causes precipitates in sera?
- Fibrin appears as larger particles (up to 1mm) and visible to the naked eye. Blood must be collected, chilled and processed quickly. Occasionally, not all of the fibrinogen is transformed into fibrin before filtration. These particles can form during frozen storage as well.
- Calcium phosphate particles appear as fine cloudiness in serum. This precipitate will appear as fine black dots.
- Other material which can occur in serum include other protein and cholesterol precipitates.
Which conditions may increase the quantity of precipitates?
- Heat inactivation of serum
- Extended Incubation at 37ºC
- Repeated freeze and thaw cycles
- Thawing without mixing
- Long term storage at 2-8ºC
- Storage in self defrost freezer
- Gamma irradiation
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