Methicillin is β-lactam antibiotic of the penicillin family. It has a narrow-spectrum, primarily targeting gram-positive bacteria such as Staphylococcus aureus. It is often used to study susceptibility and resistance of bacteria to antimicrobials, especially methicillin-resistance in Staphylococcus aureus. Methicillin is inactivated by gastric acid.

Methotrexate sodium salt is an anti-cancer agent that works by inhibiting folic acid metabolism. Methotrexate is an allosteric dihydrofolate reductase (DHFR) inhibitor. DHFR is is an essential enzyme in folic acid metabolism. Folic acid is necessary for production of thymidine and purine; therefore, methotrexate is a nucleic acid synthesis inhibitor. It is freely soluble in aqueous solution.

Mezlocillin sodium is an extended-spectrum β-lactam antibiotic of the penicillin family. It targets gram-negative and gram-positive bacteria.

Miconazole Nitrate is an imidazole antifungal targeting fungi responsible for causing tinea, especially Trichophyton species. It is an ergosterol synthesis inhibitor, which ultimately increases cell membrane permeability and causes fungal cell death. Miconazole nitrate inhibits platelet cyclooxygenase and induces reactive oxygen species in fungal biofilms. Additionally, it has been used to study automated luminescence-based cytochrome P450 profiling.

Micro Agar is a purified agar with a high gel strength and excellent properties for use in plant cell and tissue culture, as well as microbiological work. Micro Agar can be used in a minimal concentration of 5.5 g/L to obtain a solid gel.

Micronomicin sulfate is an aminoglycoside antibiotic effective against gram-negative bacteria. It is freely soluble in water.

The pMicroRNA studies Luciferase plasmid is specifically designed for studying the regulation of gene expression by microRNAs (miRNAs) and other post-transcriptional regulatory factors. The plasmid contains a luciferase reporter gene that can be fused to the 3′ untranslated region (3′ UTR) of a target gene, allowing researchers to investigate how miRNAs or RNA-binding proteins influence the stability and translation of mRNA.

The pMicroRNA studies Luciferase plasmid is a synthetic plasmid obtained from a third party and its sequence has been confirmed at GoldBio.

Mildronate is a pharmaceutical amino acid amide believed to stimulate vasodilation, thus used to treat angina and myocardial infraction. Chemically, it identifies with aromatic ethers and secondary alcohols. It is a substrate for γ-butyrobetaine dioxygenase and structural analogue of γ-butyrobetaine, competitively inhibiting by binding to the γ-butyrobetaine hydroxylase substrate.

It is a biological regulator to alpha 2-adrenergic receptors as well as nitric oxide-dependent mechanisms, functions which reduce blood glucose concentrations through oxidation. In ocular and cerebral ischemia, Mildronate decreases symptoms of circulatory disturbance through inhibition of carnitine synthesis.

Miltefosine is a biologically active alkylphospholipid that inhibits protein kinase C and phosphatidylcholine synthesis. It has been shown to induce apoptosis of a variety of cancer cell lines. Additionally, miltefosine is used against leishmaniasis and metronidazole-resistant and -susceptible strains of Trichomonas vaginalis. It is studied for its potential use as an anticancer agent.

Minocycline HCl is a broad-spectrum tetracycline antibiotic. It has been shown to inhibit endothelial cell proliferation and angiogenesis, MMP-3, PARP, and the replication of HIV and SIV. It has also displayed anti-inflammatory and anti-collagenase activity. Minocycline HCl is freely soluble in aqueous solution.