Southern blot analysis for the presence of the LN and LNL6 vector in DNA from PB and marrow in baboon, F93449, on week 4 after transplant. DNA was restricted with Sac I, which cuts both vectors outside of the neo gene. The expected size for LNL6 is 3052 bp and for LN, 2371 bp. Positive control standards and dilutions consist of the indicated ratios of DNA from HT1080 cells marked with a single copy of either the LN or the LNL6 vector mixed with normal DNA.