Different AAV serotypes display distinct tissue tropism, believed to be related to the distribution of their receptors on target cells. The AAV serotype helper plasmids pXR1, pXR2, pXR4, and pXR5, as well as the plasmid pXX6-80 containing the adenovirus helper genes for AAV replication, have been described elsewhere (32, 47). AAV6 helper plasmid pXR6 was kindly provided by Joseph Rabinowitz (Thomas Jefferson University) If you have any queries about exactly where and how to use manufacturer of sialic acid powder as Raw Material for pharmaceuticals, you can get in touch with us at our own web-page. .