apart from the antiserum to the synthetic cooh terminus ( p408-417 ) , which reacted strongly with the lactose/h+ transporter and has previously been used to localize the cooh terminus on the cytoplasmic face of the membrane , only those antibodies directed against the peptide corresponding to amino acid residues 125-135 ( p125-135 ) exhibited a marked reaction with the transporter , while antibodies to the five other peptides reacted very weakly or not at all , suggesting that most of the hydrophilic segments are conformationally restricted or buried in the interior of the protein .
C0020960
antiserum
C0003241
antibodies