The formation from simpler components of melanins, pigments largely of animal origin. High molecular weight polymers of indole quinone, they are irregular polymeric structures and are divided into three groups: allomelanins in the plant kingdom and eumelanins and phaeomelanins in the animal kingdom.

Catalysis of the hydrolysis of ester linkages within nucleic acids by removing nucleotide residues from the 3' end.

Catalysis of the reaction: carbamoyl phosphate + L-aspartate = phosphate + N-carbamoyl-L-aspartate.

Interacting selectively with a class II myosin, any member of the class of 'conventional' double-headed myosins that includes muscle myosin.

Catalysis of the reaction: bilirubin + NADP+ = biliverdin + NADPH + H+.

Catalysis of the reaction: ATP + biotin-carboxyl-carrier protein + CO2 = ADP + phosphate + carboxybiotin-carboxyl-carrier protein.

Catalysis of the reaction: ATP + biotin + apo-(acetyl-CoA:carbon-dioxide ligase (ADP forming)) = AMP + diphosphate + (acetyl-CoA:carbon-dioxide ligase (ADP forming)).

A multienzyme complex that catalyzes the reversible oxidation of glycine. In E. coli, it has four components: dihydrolipoamide dehydrogenase, glycine dehydrogenase (decarboxylating), lipoyl-GcvH-protein and aminomethyltransferase.

Catalysis of the reaction: ATP + biotin + apo-(3-methylcrotonoyl-CoA:carbon-dioxide ligase (ADP-forming)) = AMP + diphosphate + (3-methylcrotonoyl-CoA:carbon-dioxide ligase (ADP-forming)).

A component, along with aminomethyltransferase, of the glycine cleavage system; it is found as a homodimer or as a tetramer with two alpha subunits and two beta subunits.

Catalysis of the reaction: ATP + biotin + apo-(methylmalonyl-CoA:pyruvate carboxytransferase) = AMP + diphosphate + (methylmalonyl-CoA:pyruvate carboxytransferase).

Any substance involved in the initiation, activation, perpetuation, repression or termination of polypeptide synthesis at the ribosome.

An enzyme complex that catalyzes the phosphorylation of phosphorylase b to form phosphorylase a.