e. coli strain

Polymyxin B Sulfate (Poly-RX) 是一个阳离子型表面活性剂抗生素剂，能够提高细胞膜的渗透性。

Neospiramycin I is a macrolide antibiotic and derivative of spiramycin I.1It is active against the macrolide-sensitive KB210, but not the macrolide-resistant KB224, strain ofS. aureus(MICs = 3.12 and >100 μg/ml, respectively), as well asB. cereus,B. subtilis,M. luteus,E. coli, andK. pneumoniae(MICs = 1.56, 3.12, 3.12, 0.2, 50, and 12.5 μg/ml, respectively). Neospiramycin I binds toE. coliribosomes with an IC50value of 1.2 μM. It protects against mortality in a mouse model ofS. pneumoniaetype III infection (ED50= 399.8 mg/kg).2

Oxanosine is an analog of guanosine that has been found in S. capreolus and has diverse biological activities, including antibacterial, antiviral, and anticancer properties. It is active against a variety of bacteria, including S. flexneri, P. mirabilis, and E. coli (MICs = 6.25, 12.5, 25 µg ml, respectively, on peptone, but not nutrient, agar). Oxanosine inhibits replication of the HIV-1 strain IIIb in infected CEM and U937, but not H9, cells (EC50s = 7, 27, and >500 µg ml, respectively). It also inhibits the growth of HeLa human cervical cancer cells (IC50 = 32 µg ml) and reduces tumor growth in a murine L1210 lymphocytic leukemia model.

Tigecycline tetramesylate (GAR-936 tetramesylate)为一款广谱甘氨酰环素类抗生素，对E. coli (MG1655菌株)展现出约125 ng mL的平均抑制浓度(MIC)。针对Acinetobacter baumannii (A. baumannii)的MIC50与MIC90分别达到1 mg L与2 mg L。

Majoranaquinone对4种Staphylococcus菌株、1种Moraxella菌株和1种Enterococcus菌株显示出良好的抑菌作用。此外，Majoranaquinone在E.coli ATCC 25922菌株中表现出显著的外排泵抑制活性，并能有效抑制E.coli ATCC 25922和E.coli K-12 AG100的生物膜形成。

p-Nitrophenyl α-L-arabinopyranoside 是一种生化试剂，可被重组 BgaA (rBgaA，从含有 pEBGA29 的大肠杆菌 BL21 (DE3) 菌株中分离) 水解，并在酶活性检测中具有潜在应用价值。