SRS2706019 SAMN08045552 GSM2861629 1358 Lactococcus lactis bioproject 419143 PRJNA419143 source_name cell strain F44 treated with none (pH7) SRS2706021 SAMN08045551 GSM2861630 1358 Lactococcus lactis bioproject 419143 PRJNA419143 source_name cell strain F44 treated with pH 4.0 medium for 1hr