>3FCA_1|Chains A, B|Cysteine synthase|Thermus thermophilus (274) MMERLIGSTPIVRLDSIDSRIALKLEKNNPGGSVKDRPALFMILDAEKRGLLKNGIVEPTSGNMGIAIAMIGAKRGHRVILTMPETMSVERRKVLKMLGAELVLTPGELGMKGAVEKALEISRETGAHMLNQFENPYNVYSHQFTTGPEILKQMDYQIDAFVAGVGTGGTISGVGRVLKGFFGNGVKIVAVEPAKSPVLSGGQPGKHAIQGIGAGFVPKILDRSVIDEVITVEDEEAYEMARYLAKKEGLLVGISSGANVAAALKVAQKLGPDARVVTVAPDHAERYLSIL