Figure 15. A chronological study during the winter months of alligator
peripheral blood lymphocytes. Beginning and ending dates are indicated
within the parentheses on the abscissa. Cells were cultured at 32C,
pulsed on day 4 and harvested on day 5. LPS and PHA concentrations were
10 yg and 1 yl, respectively. S.I. = Stimulation Index.