Additional file 1.

Figure S4. Freezing curves of the machine cryopreservation protocols. The curves for the machine based freezing rates were recorded by the machine and summarized here for the protocols 1–6. The curves show just small variations during the heat release phase between 0 and −10°C.

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Naaldijk et al. BMC Biotechnology 2012 12:49   doi:10.1186/1472-6750-12-49