>2kzt_B mol:protein length:131 Programmed cell death protein 4 GGQQPVNHLVKEIDMLLKEYLLSGDISEAEHCLKELEVPHFHHELVYEAIVMVLESTGE SAFKMILDLLKSLWKSSTITIDQMKRGYERIYNEIPDINLDVPHSYSVLERFVEECFQA GIISKQLRDLCPS