The characteristics of selected physico-chemical properties of chemically modified myofibrillar protein

The objective of the present research was to investigate the influence of c hemical modification and method of preservation of separated myofibrillar p roteins on their physico-chemical properties. Myofibrillar proteins were th e subject to succinylation or acylation and after modification one part of each preparation was lyophilised, the second part was spray dried and the t hird part was frozen. The chemical composition of protein preparations did not change significantly after any method of treatment. The process of chem ical modification influenced the water-holding capacity and protein digesti bility in vitro. Modified samples absorbed less water than standards and al so were less susceptible to enzymatic hydrolysis. The shape of sorption iso therms of modified proteins was typical for hygroscopic products and hyster esis loops were observed.