Figure 1.
The effect of storage conditions on MCP-1 stability. MCP-1 solutions (recombinant human MCP-1 in complete medium) were stored at standard conditions, 4°C, −20°C, or −81°C for seven days and analyzed by ELISA for the concentration of MCP-1. Values are presented as mean ± SD, * p < 0.05 and ** p < 0.01 for changes in the concentration.