Transcriptional analysis of the L. plantarum cggR operon. (A) Primer extension products were obtained by using oligonucleotide cgg4 and total RNA extracted from LM3 and LM3-CC1. As a reference, sequencing reactions were performed with the same primer. Lanes: 1, LM3; 2, LM3-CC1. Northern blot hybridization of total RNA extracted from LM3 and LM3-CC1 with cggR (B) or enoA1 (C) probes. Lanes: 1, LM3; 2, LM3-CC1.