TABLE 3.
Comparison of phage inactivation properties of different LTAs purified from Lactobacillus delbrueckii subsp. lactis strainsa
| Strain | Inactivation ratio for indicated phage
|
|||||
|---|---|---|---|---|---|---|
| LL-H | LL-H-a21 | LL-K | LL-S | JCL1032 | 0235 | |
| ATCC 15808 | 1b | 1b | 1 | 1 | 1b | 1 |
| Ads-5 | <10−3b | 0.2b | <10−3 | <10−2 | 0.2b | 0.3 |
| ATCC 15808(J1) | <10−3 | 1 | <10−3 | <10−2 | 0.1 | 0.1 |
| LL78 | 10−2 | 1 | 0.1 | 10−2 | 10−2 | <10−2 |
a
First, the amount of LTA-phosphorus needed for 50% of phage inactivation was estimated (see Materials and Methods). Each L. delbrueckii phage was considered separately. A value of 1 was given to the LTAs that could inactivate the phage with the smallest amount of LTA-phosphorus. All other LTA samples were compared to this figure. Concentrations of LTA-phosphorus of ATCC 15808 needed for 50% phage inactivation were as follows: for LL-H-a21, 10 pg per ml; for LL-H, LL-K, JCL1032, and 0235, 100 pg per ml; for LL-S, 1 ng per ml.
b
Previous results (34).