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8.A.106.1.1
Caltrin of 80 aas and 1 N-terminal TMS.  Caltrin (calcium transport inhibitor) is a family of small, basic proteins of the mammalian seminal plasma which bind to sperm cells during ejaculation and inhibit the extracellular Ca2+ uptake, preventing the premature acrosomal exocytosis and hyperactivation when sperm cells ascend through the female reproductive tract (Grasso and Coronel 2017). It binds calmodullin but not calcium.  It also inhibits the growth of microorganisms, possibly by acting as an antibiotic, permeabilizing the bacterial membrane (Krauhs et al. 1990).

Accession Number:P06833
Protein Name:Caltrin
Length:80
Molecular Weight:8977.00
Species:Bos taurus (Bovine) [9913]
Substrate

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MMAGRRSWPA MATVLLALLV CLGELVDSKP QPSDEKASPD KHHRFSLSRY AKLANRLANP 
61:	KLLETFLSKW IGDRGNRSVK