TABLE 4.

Residue composition of the two most conserved motifs in proteins of the AT-2 family

Motif no.a	Residue position	Amino acid residues and their frequency
1	18	A29 Q13 G9 R4 S4 K3 N2 M2 T1 V1
	19	G46 A15 M3 N2 I1 V1 F1
	20	I25 A15 V9 T7 L6 S3 M2 G1 K1
	21b	A64 S4 P1
	22	S17 G14 A12 I11 N5 Q5 E2 M2 V1
	23	A37 G12 S7 Q5 T4 M3 E1
	24	L17 M15 A14 N7 I5 T4 S3 V2 G1 H1
	25b	A63 N2 S1 Q1 G1 V1
	26	L19 M16 V14 A11 T6 I2 Q1
	27	A31 S25 T8 N3 G1 L1
2	51	S32 Q11 T7 G7 N4 A2 K2 Y1 H1 R1 E1
	52	A58 G7 S4
	53	V21 L21 F12 I9 Y2 M2 T1 K1
	54b	A61 S6 G1 P1
	55	I19 V19 L16 F9 A5 S1
	56b	G68 V1
	57	V19 Y16 A14 T5 G5 S4 I3 L1 M1

^aThe positions of these two motifs in the multiple alignment can be found in Fig. 1.

^bThe two most highly conserved residues in each motif.