>4rk4A (A:) observed residues (from ATOM records)
tgnigvlvsrvtnpffaglfdaierelhahgyqvmitqtyddpeaeerflkqlksreldg
vilasveapdrvmavakafpgrvvvvnadvqipgatslvlphyqatrdaldylfnqghrr
fayvsggtisgahhgqsrtqafldfmqahqllvaqdllfgqihtakegqavgkqlaslap
nvrpdavftnsdevavgvidsllaadvkvpddiavmgyddqpfapfakiplttvhqpvas
maaaathellkglgrqvaqlhlslkirqsa