[Effect of freezing on cord blood serum proteins].

The effect of freezing regimes and storage temperatures on protein conformation and the spectrum of cord blood serum has been investigated. Changes in the parameters of ESR spectra of spin probes in cord blood serum after slow freezing and subsequent thawing were established, indicating protein conformational changes characterized by loosening. This fact is confirmed by an earlier process, the first stage of albumin heat denaturation, as indicated by calorimetric data.