Plasmids containing the Ad5 E1A 13S or 12S cDNAs used to be available from the ATCC, but don't appear to be listed in the latest catalog. Contact the ATCC for more information.
Antibodies
Monoclonal:
The M58 antibody developed by Dr. E. Harlow can be obtained from many sources, including:
The 293 human embryonic kidney cell line developed by Dr. F.L. Graham can be obtained from the ATCC as CRL-1573.
This cell line constitutively expresses the proteins encoded by E1A and E1B.
Virus
Adenovirus type 5 (VR-5) can be obtained from the ATCC