Enzymatic parameters obtained from Michaelis–Menten kinetic fits to the enzymatic assay data shown in Fig. 4.

Parameters	nALP (aq.) ± std. dev.	cALP (aq.) ± std. dev.	ALP-PS (aq.) ± std. dev.	ALP-PS in sponge
V max (μM min−1)	3.59 ± 0.29	2.35 ± 0.17	2.46 ± 0.11	4.11
V max (μM min−1 mg−1)	359.0 ± 29	235.7 ± 17	246.5 ± 11	51.8
K m (μM)	119.7 ± 15.8	41.3 ± 0.62	41.5 ± 13.8	606.2
k cat (min−1)	20 502.5 ± 1656	13 460.8 ± 971	14 077.6 ± 605	2962.5
k cat K m −1 (μM−1 min−1)	171.3 ± 25	325.9 ± 19.3	338.9 ± 147	4.9