>3ifp_B mol:protein length:219  12B4 FAB antibody light chain
DVLMTQTPLSLPVSLGDQASISCRSSQNIVHSNGNTYLEWYLQKPGQSPKLLIYKVSNR
FSGVPDRFSGSGSGTDFTLKISRVEAEDLGVYYCFQGSHVPLTFGAGTKLELKRADAAP
TVSIFPPSSEQLTSGGASVVCFLNNFYPKDINVKWKIDGSERQNGVLNSWTDQDSKDST
YSMSSTLTLTKDEYERHNSYTCEATHKTSTSPIVKSFNRNEC