Table 1. Statistical details of each separate PLS model underlying the localisation of the spectral regions of interest.

Data set	A	R2X(cum)	R2Y(cum)	Q2Y(cum)
Low Sup	2	0.636	0.906	0.818
High Sup	2	0.818	0.881	0.788
Low Pel	2	0.531	0.888	0.713
High Pel	2	0.530	0.968	0.902

A=number of components; High=high mass range (20–50 kDa); Low=low mass range (2–20 kDa); Pel=pellet fraction; PLS=partial least squares; Sup=supernatant fraction.