This family contains several Gp38 proteins from T-even-like phages. Gp38, together with a second phage protein, gp57, catalyses the organisation of gp37 but is absent from the phage particle. Gp37 is responsible for receptor recognition [1].

1: Engineering trimeric fibrous proteins based on bacteriophage T4 adhesins. Miroshnikov KA, Marusich EI, Cerritelli ME, Cheng N, Hyde CC, Steven AC, Mesyanzhinov VV; Protein Eng 1998;11:329-332. PMID:9680195

2: Salmonella Phage S16 Tail Fiber Adhesin Features a Rare Polyglycine Rich Domain for Host Recognition. Dunne M, Denyes JM, Arndt H, Loessner MJ, Leiman PG, Klumpp J; Structure. 2018;26:1573-1582. PMID:30244968