胺基酸代謝進行轉胺反應(transamination)時，通常以下列那一化合物作為胺基的接受者(amino group acceptor)，而其生成物又為何？
pyruvate, alanine
oxaloacetate, aspartate
phenylpyruvate, phenylalanine
α-ketoglutarate, glutamate
