Name two sulphur containing and two basic amino acids.

Sulfur-Containing Amino Acids:

Cysteine:

Cysteine is a non-essential amino acid that contains a thiol group (-SH). It plays a crucial role in protein structure by forming disulfide bonds, which help stabilize the three-dimensional shape of proteins. Cysteine can be synthesized in the body from methionine.
Methionine:

Methionine is an essential amino acid, meaning it must be obtained through the diet. It contains a sulfur atom in its structure. Methionine is important for protein synthesis and is a precursor for other sulfur-containing compounds, including cysteine and taurine.
Basic Amino Acids:

Lysine:

Lysine is an essential amino acid that has a basic side chain containing an amino group (-NH2). It plays a vital role in protein synthesis, hormone production, and enzyme function. Lysine is important for growth and tissue repair.
Arginine:

Arginine is a semi-essential amino acid that is classified as basic due to its guanidinium group, which can accept protons. It is involved in various physiological processes, including protein synthesis, immune function, and the production of nitric oxide, which helps regulate blood flow.
In summary, the two sulfur-containing amino acids are cysteine and methionine, while the two basic amino acids are lysine and arginine.