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. 1998 Jan 20;36(3):167–177. doi: 10.1016/S0166-3542(97)00052-1

Table 4.

Serum LAP levels in HIV-1 infected subjects

Proviral load (copy/106 PBMC) LAP activity (U/ml)
Control (non-infected)
 (>600 CD4 cell counts/μl) 0.00047±0.00003



Infected
 (200–500 CD4 cell counts/μl) 8–50  (n=8) 1.43±0.23
50–170 (n=8) 1.28±0.09

One unit of LAPase is defined as the amount of enzyme required to hydrolyze 1 μmol of l-Leucine-β-naphthylamide to l-leucine and β-naphthylamide per min at pH 7.5 and 37°C.