The energy investment phase of glycolysis involves the conversion of 6-carbon glucose into 2 molecules of 3-carbon glyceraldehyde 3-phosphate (G3P), using 2 ATP.

EMP Pathway: Energy Investment Phase

The energy payoff phase of glycolysis involves the conversion of the 2 molecules of G3P from the investment phase into 2 molecules of pyruvate, during which 4 ATP and 2 NADH are also generated.

EMP Pathway: Energy Payoff Phase

The two phases of the EMP pathway are:

- Energy Investment Phase
- Energy Payoff Phase

University of Notre Dame

The type of glycolysis found in animals and most common in microbes consisting of two phases: energy investment and payoff phases

(Photo credits in References)

Embden-Meyerhof-Parnas (EMP) pathway

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Two Phases of the EMP Pathway

Products of the EMP Pathway

EMP Pathway Diagram (Figure 8.10). Reprinted from OpenStax Microbiology (p. 300), by N. Parker, M. Shneegurt, A.-h. Thi Tu, B. M. Forester, and P. Lister, 2016, Rice University. Copyright 2016 by Rice University.

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