Analysis of viral transcripts in tissues. Axillary lymph nodes were obtained at necropsy from one macaque after rebound from HAART (Mmu 35913; plasma viral load, 930 copies/ml) and from another macaque during HAART (Mmu 35343; plasma viral load, 28 copies/ml). PCR amplification was performed to detect gag, pol, and env RNAs. A control reaction without RT (mock cDNA sample) was included for each animal. Lane M, Bionexus All Purpose Lo marker.