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History and Philosophy of the Life Sciences

, Volume 37, Issue 2, pp 180–209 | Cite as

Discovery of causal mechanisms

Oxidative phosphorylation and the Calvin–Benson cycle
  • Raphael Scholl
  • Kärin Nickelsen
Original Paper

Abstract

We investigate the context of discovery of two significant achievements of twentieth century biochemistry: the chemiosmotic mechanism of oxidative phosphorylation (proposed in 1961 by Peter Mitchell) and the dark reaction of photosynthesis (elucidated from 1946 to 1954 by Melvin Calvin and Andrew A. Benson). The pursuit of these problems involved discovery strategies such as the transfer, recombination and reversal of previous causal and mechanistic knowledge in biochemistry. We study the operation and scope of these strategies by careful historical analysis, reaching a number of systematic conclusions: (1) even basic strategies can illuminate “hard cases” of scientific discovery that go far beyond simple extrapolation or analogy; (2) the causal–mechanistic approach to discovery permits a middle course between the extremes of a completely substrate-neutral and a completely domain-specific view of scientific discovery; (3) the existing literature on mechanism discovery underemphasizes the role of combinatorial approaches in defining and exploring search spaces of possible problem solutions; (4) there is a subtle interplay between a fine-grained mechanistic and a more coarse-grained causal level of analysis, and both are needed to make discovery processes intelligible.

Keywords

Discovery of causal mechanisms Context of discovery  Causality Mechanisms Oxidative phosphorylation Photosynthesis 

Notes

Acknowledgments

We thank the Lake Geneva Biology Interest Group (LG-BIG) and the participants of a January 2014 workshop on “Causality in the Biological Sciences” in Cologne, Germany. In addition, we are particularly grateful to the following for a close reading of an earlier version of the manuscript: Bill Bechtel, Ingo Brigandt, Sara Green and Nick Jones. Raphael Scholl was supported by a Grant from the Swiss National Science Foundation (P300P1_154590).

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Authors and Affiliations

  1. 1.Center for Philosophy of Science, 817 Cathedral of LearningUniversity of PittsburghPittsburghUSA
  2. 2.Historisches Seminar der LMU MünchenMunichGermany

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