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. Author manuscript; available in PMC: 2019 Feb 25.
Published in final edited form as: Math Biosci. 1994 Mar;120(1):25–76. doi: 10.1016/0025-5564(94)90037-x

FIG. 9.

FIG. 9.

The experimentally observed cAMP secretion in response to a multistep stimulus. The first step is from 0 to 10−9 M, and this is followed by three 10-fold increases. (Adapted from [9].)