Table 5.

Pearson’s correlation coefficients between the Rubisco kinetic parameters at 25 °C and 4 °C and either the percentage of Rubisco in the total soluble protein, ¹³C isotope discrimination, or pH compensation point, considering (A) all 17 seaweed populations together, and (B) the 14 red and brown seaweed populations (all possessing form ID Rubiscos) alone

(A) Data from all populations analyzed together
	25 °C			4 °C
	K c	k cat c	k cat c /K c	K c	k cat c	k cat c /K c
δ 13 C alga	0.505*	0.57*	0.1	0.502*	0.601*	0.514*
pH compensation point	0.455	0.637*	0.488	0.554*	0.65*	0.519
[Rubisco]/ [TSP]	–0.34	–0.519*	–0.575*	–0.476	–0.513*	–0.339
(B) Data from red and brown algal species (Form ID Rubiscos)
	25 °C			4 °C
	K c	k cat c	k cat c /K c	K c	k cat c	k cat c /K c
δ 13 C alga	0.01	0.27	0.26	0.13	0.44	0.518
pH compensation point	–0.15	0.669*	0.806**	0.41	0.777**	0.573
[Rubisco]/ [TSP]	0.42	–0.545	–0.768**	–0.549	–0.536	–0.29

k _cat ^c/K_c, carboxylation efficiency; k_cat^c, carboxylase turnover rate; K_c, Michaelis–Menten affinity constant for CO₂; [Rubisco]/[TSP], percentage of Rubisco in the total soluble protein; δ¹³C_alga, ¹³C isotope discrimination. *P<0.05, **P<0.01, ***P<0.001.