Keratin-associated protein 4-9 (Keratin-associated protein 4.9) (Ultrahigh sulfur keratin-associated protein 4.9)
1_MVSSC 6_ CGSVC 11_ SDQGC 16_ GQDLC 21_ QETCC 26_ RPSCC 31_ ETTCC 36_ RTTCC 41_ RPSCC 46_ VSSCC 51_ RPQCC 56_ QSVCC 61_ QPTCS 66_ RPSCC 71_ QTTCC 76_ RTTCY 81_ RPSCC 86_ VSSCC 91_ RPQCC 96_ QPACC 101_ QPTCC 106_ RPSCC 111_ ETTCC 116_ HPRCC 121_ ISSCC 126_ RPSCC 131_ VSSCC 136_ KPQCC 141_ QSVCC 146_ QPNCC 151_ RPSCS 156_ ISSCC 161_ RPSCC 166_ ESSCC 171_ RPCCC 176_ VRPVC 181_ GRVSC 186_ HTTCY 191_ RPTCV 196_ ISSCP 201_RPLCC
1: In the hair cortex, hair keratin intermediate filaments are embedded in an interfilamentous matrix, consisting of hair keratin-associated proteins (KRTAP), which are essential for the formation of a rigid and resistant hair shaft through their extensive disulfide bond cross-linking with abundant cysteine residues of hair keratins. The matrix proteins include the high-sulfur and high-glycine-tyrosine keratins