- \(22\%\) protein by mass corresponds to \(1.008 \, \text{g/mL}\)
- \(51\%\) protein by mass corresponds to \(1.064 \, \text{g/mL}\)
\[
\boxed{
\begin{align_}
22\% & \rightarrow 1.008 \, \text{g/mL} \\
51\% & \rightarrow 1.064 \, \text{g/mL}
\end{align_}
}
\]