A comparison of the relative migration rate of the β component (higher-molecular-weight component consists of two α chains), as well as the relative band intensity between β component and α chains are presented in Table 1 , from which a clear trend indicating greater migration rate of β, as well as the increase of β/α intensity ratios could be observed upon increasing the esterification degrees of PAA-NHS esters, testified the increase of the MW of collagen due to the modification.
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Novel Modification of Collagen: Realizing Desired Water Solubility and Thermostability in a Conflict-Free Way.
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