Table 7.

G-domain strands, turns, and helix, IMGT positions, and lengths, based on the IMGT unique numbering for G-domain (G-DOMAIN and G-LIKE-DOMAIN).

G-domain strands, turns, and helixa	IMGT positionsb	Lengthsc	Characteristic IMGT Residue@Positiond and additional positionse
A-STRAND	1–14	14	7A, CYS-11
AB-TURN	15–17	3 (or 2 or 0)
B-STRAND	18–28	11 (or 10f)
BC-TURN	29–30	2
C-STRAND	31–38	8
CD-TURN	39–41	3 (or 1g)
D-STRAND	42–49	8	49.1–49.5
HELIX	50–92	43 (or less or more)	54A, 61A, 61B, 72A, CYS-74, 92A

^aIMGT^® labels (concepts of description) are written in capital letters (no plural) (60).

^bBased on the IMGT unique numbering for G-domain (G-DOMAIN and G-LIKE-DOMAIN) (8, 66).

^cIn number of AA (or codons).

^dIMGT Residue@Position is a given residue (usually an AA) or a given conserved property AA class, at a given position in a domain, based on the IMGT unique numbering (66).

^eFor details on additional positions, see Ref. (8).

^fOr 9 in some G-BETA (8).

^gOr 0 in some G-ALPHA2-LIKE (8).