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. 2011 Sep 23;26(12):3249–3263. doi: 10.1093/humrep/der317

Table II.

Metabolic tracing of exogenous 13C1 labeled pyruvate in human spermatozoa by LC-MS.

Measured metabolite Start concentration (mM, t = 0) End concentration (mM, t = 120 min) Consumption (mM) Production (mM)
13C1 pyruvate 0.91 ± 0.05 0.52 ± 0.01 0.39 ± 0.05
13C1 lactate 0 0.37 ± 0.04 0.37 ± 0.04

Concentration values (mM) represent total amount of metabolite in the sample (extra- and intracellular) and are presented as mean ± SEM from five different experiments (n = 10).