Table 3.

Percentage identity of the 20-amino-acid core-box region in reptilian beta-keratins (lizards, snakes, alligators) and chick scale, claw, and feather keratins, using ClustalX2.0 (Larkin et al. 2007). Li-gprp-1_5: core-box of lizard Podarcis siculabeta-keratins (CAI67601, CAJ90482, CAJ90483, CAJ90484, CAJ90485); Ge-gprp-1_2: core-box of gecko lizard Tarentola mauritanicabeta-keratins (CAJ44302 and CAK19320); Ge-gprp-3: core-box of gecko lizard Tarentola mauritanicabeta-keratin (CAK19321); Ge-gprp-4 and Ge-gprp-5: core-box of gecko lizard Hemidactylus turcicusbeta-keratins (CAJ90467 and CAK19322); Sn-gprp-1_4: core-box of snake Elaphe guttatabeta-keratins (CAL49457, CAL49458, CAL49459, CAL49460); Sn-gprp-5: core-box of snake Elaphe guttatabeta-keratin (CAL51276); Alligator: core-box of alligator beta-keratin (Sawyer et al. 2000); Chick-scale: core-box of chicken scale beta-keratin (P04459); Chick-claw: core-box of chicken claw beta-keratin (AAA62730); Chick-feather: core-box of chicken feather beta-keratin (P02450)

	Li-gprp-1_5	Ge-gprp-1_2	Ge-gprp-3	Ge-gprp-4	Ge-gprp-5	Sn-gprp-1_4	Sn-gprp-5	Tu-gptrp-1	Tu-gptrp-2	Tu-gptrp-3–5	Tu-gptrp-4	Cr-gpyrp-1	Cr-gpyrp-2	Alligator	Chick Scale	Chick Claw	Chick feather
Li-gprp-1_5	100	75	75	75	75	70	75	55	70	60	50	60	70	65	60	70	60
Ge-gprp-1_2		100	90	100	90	70	75	80	80	70	70	80	80	70	75	70	80
Ge-gprp-3			100	90	85	70	75	70	80	70	70	80	80	70	75	70	80
Ge-gprp-4				100	90	70	75	80	80	70	70	80	80	70	75	70	80
Ge-gprp-5					100	65	70	70	75	65	70	75	75	65	70	65	75
Sn-gprp-1_4						100	95	60	80	75	60	70	80	70	70	75	70
Sn-gprp-5							100	65	85	80	65	75	85	75	75	80	75
Tu-gptrp-1								100	80	75	75	75	75	65	70	65	85
Tu-gptrp-2									100	90	80	80	90	80	80	75	90
Tu-gptrp-3–5										100	80	70	80	70	70	65	80
Tu-gptrp-4											100	70	70	60	65	60	80
Cr-gpyrp-1												100	90	75	85	75	90
Cr-gpyrp-2													100	85	85	80	90
Alligator														100	80	80	75
Chick scale															100	85	80
Chick claw																100	75
Chick feather																	100