Packaging:LDL is membrane filtered and aseptically packaged in a solution containing phosphate-buffered saline at pH 7.4 and < 0.1uM EDTA-Na2.

Preparation: Human Low Density Lipoprotein, LDL, (Cat. No. PC-35220) is isolated fromblood bank produced human plasma. It is purified via ultracentrifugation to homogeneity determinedby agarose gel electrophoresis. Each lot is analyzed on agarose gel electrophoresis for migration versus LDL. LDL is a large protein (MW 3,500 kDa) with a diameter of 25.8 nm.It is composed of approximately 20-25% protein and 75-80% lipid. The lipid portion can be further described as 9% free cholesterol, 42% cholesteryl ester, 20-24% phospholipid, and 5%triglyceride. 

Purity: 98%, is determined agarose gel electrophoresis 

Specifications: 0.22 micron filtered; Aseptically Filled; Cell Culture Tested.

Special Note: After prolonged storage, some precipitate may be observed. This is normal for this product. Clarify out the aggregates by spinning in a microfuge for 2 minutes.

Biological Activity:Sample lots of AY LDL are evaluated for receptor binding to peritoneal macrophages in conjunction with our DiI-Ox-LDL and [I-125] Ox-LDL