>4gkc_A mol:protein length:133 Retinol-binding protein 2TRDANGTWEMESNENFEGWMKALDIDFALRKIAVRLTQTLVIDQDGDNFKVKCTSTFWNYDVDFTVGVEFDEYTKSLDNRHVKALVTWEGDVLVCVQKGEKENRGWKKWIEGDKLYLELTCGDQVCRQVFKKK