Table 4.

Interhelical angles and distances for structures of S100B

	Interhelical Angles (°)a,b						Interhelical distance (Å)a,b
	I to II	I to III	I to IV	II to III	II to IV	III to IV	I to II	I to III	I to IV	II to III
Ca2+-S100B (X-ray)c	140	−121	125	99	−32	110	15	22	12	12
Ca2+-S100B-A(X-ray)	143	−120	126	97	−32	109	14	22	12	12
Ca2+-S100B-B(X-ray)	143	−120	127	98	−31	109	14	22	13	12
TRTK-Ca2+-S100B (X-ray)	143	−117	128	99	−32	110	14	22	12	12
Ca2+-S100B (NMR)d	138	−127	124	93	−36	106	17	25	14	12
TRTK-Ca2+-S100B (NMR; Inman et al)e	132	−116	122	108	−35	119	15	22	12	11
TRTK-Ca2+-S100B (NMR; Shaw et al)f	134	−105	132	115	−48	111	15	21	13	12

^aInterhelical angles and distances were calculated using INTERHLX software (K. Yap, University of Toronto).

^bThe residues defining each helix of S100B were as follows: helix I, residues 2–18; helix II, residues 29–40; helix III, residues 50–62; and helix IV, residues 70–82.

^cCalculated using PDB entry 1MHO.

^dCalculated using PDB entry 2K7O.

^eCalculated using PDB entry 1MWN.

^fCalculated using PDB entry 1MQ1.