Table 2. Definitions of monoclinic M _C domain pair types.

The first and second columns provide the full and abbreviated names of the domain pairs. The third column presents the concise definition of each pair. The fourth column specifies the angle ξ between SPDs as a function of ρ (defined in Fig. 1 ▸). The fifth column indicates the number of corresponding domain pairs, while the last column references the corresponding figure.

Domain pair type full name	Short name	Formal definition		N pairs	Fig.
T-sibling-planar	TSBP		2ρ	6	Fig. 2 ▸
T-sibling-crossed	TSBC	M nk M nl , |k| ≠ |l|		12	Fig. 3 ▸
T-planar-1	TP1	M nk M ml |k| = m,  |l| = n, kl > 0		6	Fig. 4 ▸
T-planar-2	TP2	M nk M ml |k| = m,  |l| = n, kl < 0		6	Fig. 5 ▸
T-semi-planar	TSP	M nk M mk , n ≠ m		6	Fig. 6 ▸
T-semi-crossed	TSC			6	Fig. 7 ▸
T-crossed	TC	M nk M ml n ≠ m, |k| ≠ |l|,		24	Fig. 8 ▸