C3E1R1A1T1I1N1S1
10 points
CERATINS is validvalid
CERATIN, keratin [n]
CERATIN, a nitrogenous compound, the constituent of horny tissue, also KERATIN [n]
CERATIN, keratin [n]
CERATIN, a nitrogenous compound, the constituent of horny tissue, also KERATIN [n]